Northwest Philatelic Library
Surplus Books For Sale as of April 5, 2017
Books may be shipped by mail - send request to nwpl@qwestoffice.net
No. Author/Pub Title Ed. Price
United States General
1 American Phil Congress The Congress Book 1985 1985 $22.50
2 American Phil Congress The Congress Book 1986 1986 $30.00
3 American Phil Congress The Congress Book 1987 1987 $25.00
4 American Phil Congress The Congress Book 1988 1988 $25.00
5 American Phil Congress The Congress Book 1992 1992 $32.50
6 American Phil Congress The Congress Book 1997 1997 $20.00
7 American Phil Congress The Congress Book 2008 2008 $35.00
8 American Phil Congress The Congress Book 2009 2009 $35.00
9 American Phil Congress The Congress Book 2011 2011 $45.00
10 Ameripex86 Catalogue $7.00
11 Armstrong US Definitive Series 1922-1938, 2nd Edition 1980 $20.00
12 Armstrong Washington-Franklin 1908-1921, 2nd Edition 1979 $40.00
13 ATA Historical Sketches of Watercraft on Stamps, Vol. 1, A-D 1975 $50.00
14 Baker Baker's US Classics 1985 $35.00
15 Bauer Franklin D. Roosevelt & the Stamps of the U.S. 1933-45 [2 copies] 1993 $10.00
16 Bedford Shiftr Hunter Letters - US Revenue Varieties 1983 $5.00
17 Beecher U.S. Domestic Postal Rates 1994 $30.00
18 Bergman 29 Years to Oblivian [MPOS] 1980 $5.00
19 Billg Billg's Philatelic Handbook Vol. 5 1948 $15.00
20 Billig Billig's Philatelic Handbook Vol. 6 1946 $15.00
21 Billg Billig's Philatelic Handbook Vol. 10 $15.00
22 Billig Billig's Philatelic Handbook Vol. 11 $15.00
23 Billig Billig's Philatelic Handbook Vol. 22 1955 $15.00
24 Billig Billig's Philatelic Handbook Vol. 43╩ $25.00
25 Billig Billig's Philatelic Handbook Vol. 44 $20.00
26 Bloss The Dealer and His Stock $10.00
27 Boeger Handbook on U.S. Luminescent Stamps [2 copies] 1975 $22.50
28 Boyden AEF on the BEF: Postal History of American Forces Used British Mails 1996 $70.00
29 Broderick Civil Censorship in the United States During World War II 1980 $18.00
30 Bruns The Philatelic Truck 1982 $10.00
31 Cabeen US 5c Red Error $5.00
32 Chase Classic United States 1845-1869 1962 $60.00
33 Clark & Ruckle The Street Railway Post Offices of Baltimore $20.00
34 Collectors Institute Pictorial Treasury of U.S. Stamps [3 copies] $10.00
35 CS & CSS Christmas Seal Catalogue [U.S. National] 2006 $22.50
36 Datz On the Road: The Quest for Stamps 1991 $5.00
37 Davis U. S. 1887 3 Cent Vermillion 1922 $27.50
38 Dolin & Duamaine Duck Stamp Story , signed by Duamaine 2000 $425.00
39 Durland Standard Plate Number Catalog 2008 2008 $25.00
41 Evans The United States 1cent Franklin 1861-18676 1997 $25.00
42 F.I.P. Guide to Exhibiting & Judging 1993 $10.00
43 Fireman Wells Fargo in Arizona Territory 1978 $5.00
44 Foster Showcasing Your Stamp Collection [2 copies] 1978 $10.00
45 Frickstad A Century of California Post Offices╩ 1955 $25.00
46 Frickstad A Century of California Post Offices╩ 1955 $25.00
47 Furman The 1999 Comprehensive Catalogue US Stamp Booklets 1999 $17.00
49 Gamett Nevada Post Offices 1983 $30.00
50 Ganz Every Stamp Tells a Story╩ 2014 $6.00
51 Gibbs Postal Stationery of the Canal Zone 2003 $3.00
52 Gibbs Postal Stationery of the Canal Zone 2009 $25.00
53 Gibbs Postal Stationery of the Canal Zone 2014 $30.00
54 Giblin Record of the Fargo Family $5.00
55 Globus Famous Stamps and Their Stories 1938 $10.00
56 Goodwin The 1861-1868 US Stamps $5.00
57 GraphiGuide for US Stamps 1975 $25.00
58 Grant How to Deal in Stamps $8.00
59 Granville Price Predictions of United States Stamps, 3rd, Vol. II 1947 $15.00
60 Griffenhagen╩ Mini-Adventures in Topical Stamp Collecting 1981 $5.00
61 Hahn Famous American Series of 1940 1950 $18.00
62 Harmer American Bank Note Company Archives, Part III 2008 $15.00
63 Hearst Forensic Philately 1986 $10.00
64 Helbock Portland Area Postal History 1983 $35.00
65 Helbock Post Offices of New Mexico 1981 $15.00
66 Helbock Prexie Posrtal Hisory╩ [2 copies] 1988 $10.00
67 Herst Stories to Collect Stamps By [Autographed] 1960 $20.00
68 Interphil76 Catalogue (2 copies) 1976 $5.00
69 Ivory Stamp Club Album 1934 $7.00
70 Johl US Commemorative Stamps of the Twentieth Century, Vol. II 1947 $50.00
71 Kaduck Rare and Expensive Postcards 1975 $7.00
72 Kaduck Rare and Expensive Postcards 1979 $7.00
73 Kiusalas Specialized Catalogue 1912 [2 copies] 1997 $65.00
74 Klug 100 Greatest American Stamps 2007 $10.00
75 Kunze The Presidential Series Manual 1939 $10.00
76 Kunze Stamp Romances: 1934 National Park Series of Stamps 1935 $10.00
77 Lawrence Linn's Plate Number Coil Handbook 1990 $65.00
78 Lehnus Angels to╩ Zepplins, Guide to Persons, Object, Topics on US stamps 1982 $5.00
79 Levy Cataloge - US Stamps, Stamped Evelopes, and Possessions,╩ 1919 $20.00
80 Lindquist Stamp Specialist - Vol. 1, Part 1╩ [2 copies] $15.00
81 Lindquist Stamp Specialist - Vol. 1, Part 2╩ [2 copies] $8.00
82 Stamp Specialist - Orange $20.00
83 Stamp Specialist - Blue $22.50
84 Stamp Specialist - Yellow╩ [2 copies] $25.00
85 Philatelic Almanac 1935 $15.00
86 Linn's US Stamp Facts 19th Century [2 copies] 1999 $5.00
87 Linn's The 1847 Issue of United Stamps 1913 $20.00
88 Luff Postage Stamps of the United States 1902 $70.00
89 Luff Postage Stamps of the United States 1981 $70.00
90 Martin Topical Stamp Collecting 1975 $15.00
91 MacBride Conederate Patriotic╩ Covers 1943 $10.00
92 Mackay The Guinness Book of Stamps Facts & Figures 1982 $8.00
93 Marzulla Pictorial Treasury of U.S. Stamps╩ 1974 $5.00
94 Megson American Exposition Postcard 1870-1920 1992 $20.00
95 Melville Postage Stamps Worth Fortunes 1908 $5.00
96 Melville United States Postage Stamps, 1847-1869╩ $20.00
97 Melville United States Postage Stamps, 1870-1893╩ $20.00
98 Melville United States Postage Stamps, 1894-1910╩ $15.00
99 Micarelli Identification Guide to US Stamps, Regular Issues 1847-1934 2001 $45.00
100 Michel US Specialized 2003/2004 2004 $25.00
101 Moser New World Archeology on Stamps, Vol. I: North America [2 copies] 1981 $7.50
102 Mosher Discovering US Rotary Booklet Pane Varieties 1926-1978 1979 $15.00
103 Mosiondz Successful Stamp Dealing 1996 $8.00
104 Mueller Common Sense Philately 1956 $25.00
105 New The Observer's Book of Postage Stamps 1967 $8.00
106 NY 2016 Official Exhibition Catalog 2016 $5.00
107 O'Keefe Philatelic Gems╩ 1984 $10.00
108 O'Keefe Philatelic Gems 2 1987 $10.00
109 Patera Your Obedient Servant 1986 $10.00
110 Perry United States, 1857-60 Issue $18.00
111 Planty Photo Encycopedia Of Cacheted F.D.C.s, Vol. 1-9 $50.00
112 Planty Photo Ency. Of Cacheted, Vol. 1 and Vol. 2 - $5 each 1976 $10.00
113 Post Office Dept. US Postage Stamps and Postagge Cards 1927 $18.00
114 Postal Laws and Regulations of the United States of America - 1940 1940 $7.00
115 Postal Laws and Regulations of the United States of America - 1948 1948 $20.00
116 Post Office Dept. A Description of United States Postage Stamps 1937 $5.00
117 Postal Service Guide to US Stamps, 36th Edition, 2009 2009 $8.00
118 Postal Service Guide to US Stamps, 37th Edition, 2010 [2 copies] 2010 $25.00
119 Raife The "B.O.P." Stamp Book $5.00
120 Reinfeld Commemorative Stamps of the USA [2 copies] 1956 $5.00
121 Repeta The Stickney Rotary Printing Press [2 copies] 1996 $10.00
122 Rose Classic United States Imperforate Stamps [5 copies] 1990 $10.00
123 Rose Fist Uniuted States Perforated Stamps - the 1857 Issue 2005 $25.00
124 Rostenberg Bibliately, reprinted from The American Philatelist 1977 $15.00
125 Rustad The Prexies╩╩ 1994 $30.00
126 Salkind US Cancels 1890-1900 1985 $15.00
127 Sampson United States Territorial Postmark Catalog [2 copies] 1950 $20.00
128 Schenk Romance of the Postage Stamp 1959 $5.00
129 Schmid How to Detect Damaged, Altered and Repaired Stamps [4 copies] 1979 $10.00
130 Scott Stamp Catalog 1928 1927 $10.00
131 Scott Stamp Catalog 1930 1929 $10.00
132 Scott 1976 Bicentennial Limited Edition, 3 vols., #3867 1976 $20.00
133 Scott Specialized Catalogue 1912 [2 copies] 2010 $5.00
134 Segal Errors, Freaks and Oddities on╩ US Stamps 1979 $5.00
135 AMS Guide to Stamp Collecting Software 1997 $9.00
136 Shreves Philatelic Dr. Paul Wampler Collection of United State Stamps & Important PNB 1998 $10.00
137 Siegel Auctions The Honolulu Advertiser Collection, Vol. 1-3 [2 copies] 1995 $80.00
138 Siegel Auctions The Robert Zoellner Collection of U.S. Postage Stamps - softcover 1998 $15.00
139 Siegel Auctions The Robert Zoellner Collection of U.S. Postage Stamps - hardbound 1998 $18.00
140 Siegel Auctions The Josiah K. Lilly Collection, Parts VI, VII, VIII and X [$20 per Part] 1968 $80.00
141 Silberberg Uninted States Stamps, Series of 1901 1976 $20.00
142 Stevens United States Postal Card Catalog 1970: 25th Ann. Edition 1970 $20.00
143 Stratton Leavitt Machine Cancellations 1972 $12.50
144 Sutton The Stamp Collector's Encyclopaedia, 6th Ed. 1966 $5.00
145 Thomas Linn's Who's Who on US Stamps [2 copies] 1991 $10.00
146 Thorp Bartels Catalogue of U.S. Stamped Envelopes 1943 $15.00
147 Thorp The Complete Guide to Stamp Collecting 1967 $1.00
148 Thorp Stamp Exhibitions 1950 $5.00
149 Toppan Historical Reference List of Revenue Stamps of the US 1899 $10.00
150 Towle Railway Mail Service - Eighth Division 1874-1908 1976 $10.00
151 Towle United States Transit Markings Catalog, Three Volume Set 1977 $225.00
152 Tropel The Impact of Indian Attracks on the Pony Express 2014 $10.00
153 Turner Sloane's Column 1961 $16.00
154 Tyler Focus on Forgeries 1993 $12.00
155 U Postal Stationery United States Postal Card Catalog 1995 $10.00
156 USPS History of the United States Postal Service, 1775-1993 $15.00
157 Vermeule Philatelic Art in America 1987 $6.00
158 Wawrukiewicz Redirected Mail: Redirecting System of the US PO for 1st Class Mail 1993 $15.00
159 Weber Physics on Stamps 1980 $5.00
160 Weiss Washington-Franklin Heads: Simplified 1991 $5.00
161 Whitebourgh Philometer Compendium [3 copies] 1957 $10.00
162 Wierenga American State Papers, Post Office Department, 1789-1833 1985 $50.00
163 Wiley The U.S. 3c Green, 1870-1887 $30.00
164 Williams╩ California Postmarks to 1935 Los Angeles County╩ 1990 $10.00
165 Williams & Williams Fundamentals of Philately - Sec. 1╩ [APS softcover] (2 copies) 1963 $15.00
166 Williams & Williams Fundamentals of Philately - Sec. 2╩ [APS softcover] (2 copies) 1960 $15.00
167 Williams & Williams Fundamentals of Philately - Sec. 3╩ [APS softcover] 1964 $15.00
168 Wishnietsky Confederate States of America Stampless Cover Catalog 1980 $10.00
169 Wood This Is Philately, 3 vol. set╩ $15.00
170 Youngblood Stamps That Glow [2 copies] 1990 $10.00
Air Mail
171 AAMS Via Airmail 1992 $15.00
172 Allaz History of Air Cargo and Airmail 1998 $20.00
173 Boughner Airmail Antics 1988 $5.00
Bousquet La aeroposta Argintina Correo Aereo 1991 $15.00
174 Davis Airpost, Nat'l Philatelic Museum 1950 $20.00
175 Frost ╩Special Zepplin Mail and Postcards 2000 $20.00
176 Harner Thomas Matthews Collection of Air Post Issues, 1964 $12.00
177 Jones Aerial Mail Service 1993 $10.00
178 Jones MAX 2004 $10.00
179 Proud Intercontinental Airmails Vol. 1, Transatlantic and Pacific $30.00
180 Proud Intercontinental Airmails Vol. 2, Ais and Australasia $30.00
181 Severe Comprehensive Listing of Artcraft Covers, 1939-1991 1992 $15.00
182 Short Glider Mail 1987 $10.00
183 American Catalog - price on book
US Northwest
184 Barklow The Old and New: History of PO's Wallowa Ct., signed╩ 1982 $5.00
185 Helbock Frontier Centennial: Western Postal Route Atlas 1981 $25.00
186 Hulin Cat of Northwest Railway Post Offices, Part II, Washington 1978 $10.00
Canada
187 Boggs Postage Stamps and Postage History of Canada, Vol. II 1945 $5.00
188 Brandon Canadian Revenue Group of BNAPS $25.00
189 Campbell Canada Post Offices 1755-1895 1972 $30.00
190 Heyn Checklist of Canada's Definitives, 1954-76 1977 $6.00
191 Harmer Newfoundland Air Mails 1953 $15.00
192 Holmes Philatelic Catalogue of Canada & British North America 1968 $40.00
193 Jarrett Postage Stamps of Canada 1923 $5.00
194 Ludlow Catalogue of Canadian Railway Cancellations 1982 $12.00
195 Richardson The Canadian Flag Cancellation Handbook 1896-1973 1973 $20.00
196 Reiche Canada: Steel Engraved Constant Plate Varieties [2 copies] 1982 $9.00
197 Rose Canadian Tagged Errors and Perfins 1970 $5.00
198 Steinhart The Admiral Era: A Rare Study 1912-1928 1981 $35.00
Great Britian/B.C.
199 Alcock & Holland Maltese Cross Cancellations of the U.K. 1960 $20.00
200 Alcock & Holland Maltese Cross Cancellations of the U.K. 1970 $40.00
201 Alderfer Introductions to the Stamps of Geat Britain 2004 $40.00
202 Australian Post Office Specimen Stamps and Stationery of Great Britain $15.00
203 Australian Post Office Australian Postage Stamps - set of 7 booklets $5.00
204 Barefoot Great Britain Revenues Second Edition 1983 $15.00
205 Beaumont & Adams Postage Stamps of Great Britain, Part 3 1954 $30.00
206 Bileski The First Philatelist? 1973 $10.00
207 Bruns The Stamps of Elizabeth, Regina & the Roayl Family 1953 $18.00
208 Burge Cancellations of the Cook Islands and Niue 1971 $17.50
209 Crofton/Corfield Adhesive Fiscal & Telegraph Stamps of British India [Photo-copy] 1905 $15.00
210 Current Concordance & I.D. Tips 1984 $7.50
211 Current Overprints on British Stamps for Use Abroad [2 copies] 2002 $20.00
212 Current Great Britain Philatelic Literature, 2nd [5 copies] 1990 $5.00
213 Current Handbook of British Philately for the Intermediate Collector 1997 $125.00
214 Current Handbook of British Philately for the Intermediate Collector - Booklets 1997 $5.00
215 Current Handbook of British Philately for the Intermediate Collector - Qvic 1997 $5.00
216 Daynes Wartime Postal Stationery 1991 $10.00
217 De La Rue Postage╩ Stamp Printing $15.00
218 Franklin Franklin's Guide to Samps of Papua and New Guinea [2 copies] 1970 $47.50
219 Fraserf Die Proofs of Waterlow & Sons: GB & Empire to 1960, Part 1 1985 $20.00
220 Haverbeck Commemorative Stamps of the British Commonwealth 1955 $10.00
221 Houseman The House That Thomas Built 1968 $15.00
222 Huggins Bristish Postal Sationery 1970 $40.00
223 Johnson British Postage Stamps 1944 $10.00
224 Kellow Kangaroos 1985 $15.00
225 Legge Australia, Line Engraved Issue of 1914 $12.00
226 Lowe British Postage╩ Stamp of the Nineteenth Century [3 copies] 1968 $5.00
227 Lowe Waterlows of Australia $5.00
228 Lowe The De La Rue Key Plates Sale (Auction Catalogue) 1979 $7.50
229 Lowe De La Rue Punch Book 1987
230 Ludington Bermuda: The Handstruck Stamps and Cancellations 1956 $15.00
231 Marcus Specimen Stamps and Stationery of Great Britain 1980 $10.00
232 Pacific Is. Study Cir. The Cook Islands to 1919 1958 $10.00
233 Pompet Post Offices of Papua and New Guinea 1885-1967 1967 $15.00
234 Powell The Postal History of the Territory of New Guinea 1964 $12.00
235 Robertson Post Roads, Post Towns and Postal Rates 1961 $20.00
236 Sanford Postal Markings of England, London and Wales, 1661-1900 1986 $6.00
237 Sefi King Edward VII Land 1912 $20.00
238 Thorton Catalogue of Official Perfins: Great Britain 1967 $5.00
239 Ward King George V, 1/2D, Die 2, Australia $15.00
240 Whitfield The De La Rue Key Plates 1979 $7.50
241 Whitney Collect British Postmarks 1979 $15.00
Asia
242 Collins Thailand, The Waterlow Proof Sheets 1917-1960 $17.00
243 Shih Stamps tell the Story of the Republic of China 1977 $10.00
244 Yang Yang's Postage Stamp & Postal History Catalog of Hong Kong 1994 $10.00
Europe
245 Allen & Silverstone Stamp Collector's Guide to Europe [2 copies] 1974 $15.00
246 Berecz Pioneer Period of Hungarian Airmail 1996 $10.00
247 Bye Norske Poststempler 1969 $10.00
248 Chaintrier Balloon Post of the Siege of Paris 1976 $15.00
249 German-English Dictionary 1992 $5.00
250 Grigalunas et. al. Postage Stamps of Lithuania 1978 $60.00
251 Hoogerdink De Kleinrond-Er Dubbelletterstempels Van Nederland Met De 1968 $10.00
252 LaBlonde World War II Mail from Switzerland to GB, Can, and US 2003 $40.00
253 Lana Mass Flights of Italo Balbo [2 copies] 1996 $25.00
254 Muller Der Poststempel auf der Freimarkenausgabe 1867 von Osterrei 1930 $25.00
255 Shelley The Spainish Civil War: Postal History $15.00
256 Schultz-Steinheil Handbook over Sveriges Frankotecken 1855-1937 1936 $25.00
257 Schultz-Steinheil Handbook over Svenska - och Makuleringsstemplar 1855-1937 1938 $15.00
258 Schultz-Steinheil Handbook over Svenska - och Makuleringsstemplar 1885-1951 1952 $75.00
259 Tchilinghirian Stamps of Italy used Abroad, part 6 1974 $10.00
South/Central Am.
260 Karer US Naval Slogan Cancels in Canal Zone and Panama, 1908-48, 2nd ed. 2002 $8.00
261 Kriebel Correio Aereo: History of Air Mail Service in Brazil 1996 $20.00
262 Moll Peruvian Civil Aviation 2000 $10.00
World Wide
263 Bierman The World's Greatest Stamp Collectors $20.00
264 Dalton Early Forged Stamps Detector 1979 $5.00
265 Eisenhart The World of Donald Evans 1980 $30.00
266 Gaines U.N. Philately [3 copies of full set] $40 ea.
267 Kronstein Rocket Mail Flights of the World to 1986 1986 $10.00
268 Kyle╩ Medicine and Stamps 1970 $10.00
269 Nierinck Recovered Mail 1978 $15.00
270 Rogers A Century of Liberian Philately 1961 $20.00
271 Serane The Serane Guide - Stamp Forgeries 1988 $45.00
272 Tyler Focus on Forgeries 1993 $25.00
273 Wellsted The Stamp Atlas 1986 $15.00
274 Zinsmeister Souvenir Sheets of the World, Vol. 2 1956 $5.00
Catalogs
275 Datz 1996/7 Catalogues of Errors on US Postage Stamps 1996 $7.00
276 Durland Standared Plate Number Catalog - 1979 1979 $5.00
277 Durland 1994 Catalog 1994 $10.00
278 Edifil Catalogo Unificado de sellos╩ 1989 $10.00
279 Eustus Australian Air Mail Catalogue 1934 $10.00
280 Facit Special 1998-99 1998 $15.00
281 Gibbons Balkans, Part 3, 1980 Ed. 1980 $10.00
282 Gibbons British Commonwealth Part I 1985 $15.00
283 Gibbons Stamps of the World 1979 1978 $20.00
284 Gibbons Great Britain Specialized 1980 $5.00
285 Gibbons Great Britain, Queen Elizabeth Pre-Decimal Issues, Vol. 3 1990 $5.00
286 Gibbons Great Britain, Queen Elizabeth Decimal Issues, Vol. 4 1981 $15.00
287 Gibbons China, 4th Ed. 1988 $10.00
288 Gibbons London International Stamp Exhibition 1980 Catalogue 1980 $5.00
289 Michel Asien 1991-2 (A-J), Ubersee Band 5 1991/2 $45.00
290 Michel Bildpostkarten-Katalog Deutschland 1985 $20.00
291 Michel Handbuch-Katalog Rollenmarken Deutschland 1982/3 $33.00
292 Michel Osterreich-Spezial 1983 $70.00
293 Michel Schweiz/Liechtenstein-Special 1989 $70.00
294 Minkus Austria, Liechtenstein, Switzerland 1981 $5.00
295 Minkus Scandanavia Baltic Countries 1981 $20.00
298 Said Malta - The Said Stamp Catalogue 1973 1973 $10.00
299 Sanabria Air Post Catalogue 1950 $20.00
300 Sanabria Air Post Catalogue, 1954-55 ed. $50.00
301 Sanabria Air Post Catalogue, 1957 ed. $45.00
302 Catalogue of Malaysia-Singapore,Brunei Stamps and Postal Stat 1991 $20.00
303 Schweiz Ersttag-Katalog: Schweiz-UNO Genf 1982 $6.00
304 Schweiz Helvetia: Switzerland Liechtenstein 1981 $10.00
305 Schweiz Kottelat:╩ Schweiz Liechtenstein 1971 $10.00
306 Schweiz Luftpost-Handbuch 2000 $10.00
307 Thorp Bartels Catalogue of stamped Envelopes and Wrappers of US 1943 $17.50
308 Terins United Nations Specialized Catalog 1967 $10.00
309 Trory Specialized Catalogue of Malta, 5th Ed. 1980 $10.00
310 Tucker United States Slogan Postmark Catalog 1938 $10.00
311 Unitrade 2007 Unitrade Specialized Catalogue of Canadian Postage 2007 $20.00
312 Whitefield Universal Standard Catalogue of Postage Stamps of World 1906 $5.00
313 Woo China - Red Revenue 3c Surcharge 1972 $15.00
314 Yvert Timbres De France, Tome 1 1975 $40.00
315 Zumstein Schweiz/Liechtenstein 2002 $5.00
316 Unitrade Specialized Cataloque of Canadian Stamps [2 copies] 2009 $10.00
317 Unitrade Specialized Catalogue of Canadian Stamps 2010 $10.00
318 Unitrade Specialized Catalogue of Canadian Stamps 2015 $15.00