Z - Gwyddor Llyfrgell 2,423 P - Iaith a Llenyddiaeth 255 Q - Gwyddoniaeth 148 H - Gwyddor Gymdeithasol 123 D - Hanes y Byd 121 A - Gwaith Cyffredinol 105 M - Cerddoriaeth 84 B - Athroniaeth, Seicoleg, Crefydd 67 T - Technoleg 65 F - Hanes Americanaidd Cyffredinol 59 K - Y Gyfraith 58 L - Addysg 49 N - Celfyddyd Gain 46 R - Meddygaeth 39 G - Daearyddiaeth, Anthropoleg, Hamdden 37 J - Gwyddor Gwleidyddiaeth 35 C - Gwyddorau Hanesyddol 31 S - Amaethyddiaeth 27 U - Gwyddor Filwrol 11 E - Hanes yr Unol Daleithiau 10 V - Gwyddor Lyngesol 5 Gweld pob un ...

Centre national de la recherche scientifique (France) 97 Centre national de la recherche scientifique (France) Centre de documentation 61 Institut nauchnoĭ informat︠s︡ii po obshchestvennym naukam (Akademii︠a︡ nauk SSSR) 47 Gotham Book Mart Collection (University of Pennsylvania) 39 Vsesoi︠u︡znai︠a︡ knizhnai︠a︡ palata 32 Gosudarstvennai︠a︡ biblioteka SSSR imeni V.I. Lenina 24 Institut nauchnoĭ informat︠s︡ii po obshchestvennym naukam (Akademii︠a︡ nauk SSSR) 24 Institut de l'information scientifique et technique (France) 22 Unesco 21 United States Department of State. External Research Staff 21 Institut nauchnoĭ informat︠s︡ii po obshchestvennym naukam (Rossiĭskai︠a︡ akademii︠a︡ nauk) 19 Vsesoi͡uznai͡a knizhnai͡a palata 18 American Bibliographic Service 17 Gosudarstvennai͡a biblioteka SSSR imeni V.I. Lenina 15 Institut nauchnoĭ informat︠s︡ii po obshchestvennym naukam (Rossiĭskai︠a︡ akademii︠a︡ nauk) 15 Library Association 15 National Institute of Justice (U.S.) 15 National Library of Medicine (U.S.) 15 Fundamentalʹnai︠a︡ biblioteka obshchestvennykh nauk (Akademii︠a︡ nauk SSSR) 14 Institut de l'information scientifique et technique (France) Sciences humaines et sociales 14 Institut nauchnoĭ informat︠s︡ii (Akademii︠a︡ nauk SSSR) 14 Library of Congress 14 United States National Technical Information Service 14 Centre de documentation sciences humaines (France) 13 Gosudarstvennai͡a publichnai͡a nauchno-tekhnicheskai͡a biblioteka (Akademii͡a nauk SSSR) 13 H.W. Wilson Company 13 Instituto Histórico e Geográfico Brasileiro 13 Instituto Histórico e Geográfico Brasileiro 13 Soviet Union Ministerstvo kulʹtury 13 Státní knihovna ČSR 13 Gweld pob un ...

English 3,260 French 797 German 703 Russian 405 Spanish 364 Italian 209 Japanese 114 Portuguese 109 Multiple 91 Chinese 78 Dutch 68 Czech 57 Indonesian 41 Polish 33 Hungarian 27 Latin 26 Swedish 22 Danish 21 Arabic 20 Korean 19 Romanian 18 Ukrainian 17 Greek 16 Norwegian 16 Hebrew 15 Croatian 13 Persian 10 Turkish 10 Undetermined 10 Catalan 9 Gweld pob un ...

20th century 63 18th century 33 19th century 25 1900 - 1999 20 1945- 18 1900-1999 17 1265-1321 12 Early modern, 1500-1700 10 1700-1799 6 1800-1899 6 1945-1989 6 1989- 6 Early works to 1800 6 Since 1945 6 1830-1886 4 1865-1936 4 1917- 4 19e siècle 4 20e siècle 4 Since 1917 4 1500 - 1700 3 17th century 3 1856-1950 3 1914 - 1918 3 1914-1918 3 1993- 3 1993-2001 3 19th cent 3 711-1516 3 Revolution, 1789-1799 3 Gweld pob un ...

United States 393 Germany 110 Soviet Union 97 Great Britain 95 Latin America 88 Japan 85 Asia 84 China 83 France 75 Italy 70 Russia (Federation) 65 Spain 64 Canada 61 Africa 56 Europe 49 Brazil 45 Mexico 41 Poland 41 Southeast Asia 39 Indonesia 37 Russia 37 Australia 35 Europe, Eastern 35 New York (State) 34 Netherlands 30 East Asia 28 Czechoslovakia 27 Argentina 26 Belgium 25 European Economic Community countries 25 Gweld pob un ...