Llyfr 872,464 Trafodyn Cynhadledd 489,947 Electronig 28,843 Dogfen y Llywodraeth 17,192 Cyfresol 12,954 Cylchgrawn 3,182 Sain 2,538 Anhysbys 1,180 Llawysgrif 411 Cit 375 Pennod Llyfr 222 Traethawd Ymchwil 180 Deunydd Cyfeirio 138 Erthygl 44 Llun 26 Papur Newydd 20 Sgôr Cerddorol 13 Map 11 Gwrthrych Ffisegol 3 Gweld pob un ...

Q - Gwyddoniaeth 148,111 T - Technoleg 126,842 H - Gwyddor Gymdeithasol 109,060 P - Iaith a Llenyddiaeth 79,136 D - Hanes y Byd 68,302 B - Athroniaeth, Seicoleg, Crefydd 58,058 R - Meddygaeth 36,246 K - Y Gyfraith 31,139 J - Gwyddor Gwleidyddiaeth 24,503 N - Celfyddyd Gain 21,767 G - Daearyddiaeth, Anthropoleg, Hamdden 20,413 L - Addysg 15,443 S - Amaethyddiaeth 13,188 M - Cerddoriaeth 9,490 Z - Gwyddor Llyfrgell 9,284 F - Hanes Americanaidd Cyffredinol 8,632 C - Gwyddorau Hanesyddol 8,063 A - Gwaith Cyffredinol 4,445 E - Hanes yr Unol Daleithiau 4,381 U - Gwyddor Filwrol 4,337 V - Gwyddor Lyngesol 1,400 Gweld pob un ...

American Society for Testing and Materials 20,639 ASTM International 19,316 Society of Photo-optical Instrumentation Engineers 16,992 IEEE Xplore (Online service) 14,725 Institute of Electrical and Electronics Engineers 13,947 IEEE Computer Society 7,172 ebrary, Inc 5,318 Society of Photo-Optical Instrumentation Engineers 5,294 SPIE (Society) 5,071 ProQuest (Firm) 4,433 Association for Computing Machinery 3,361 De Gruyter 2,464 North Atlantic Treaty Organization Scientific Affairs Division 2,454 ACM Digital Library 2,194 Ḳol Yiśraʼel 1,780 Food and Agriculture Organization of the United Nations 1,712 IEEE Electron Devices Society 1,611 IEEE Communications Society 1,552 George Clapp Vaillant Book Fund 1,438 Unesco 1,406 Organisation for Economic Co-operation and Development 1,369 National Science Foundation (U.S.) 1,368 United States National Aeronautics and Space Administration 1,263 SIGGRAPH 1,193 World Health Organization 1,125 ACM Special Interest Group on Programming Languages 1,124 American Society of Mechanical Engineers 1,124 World Scientific (Firm) 1,066 Centre national de la recherche scientifique (France) 1,047 American Chemical Society Meeting 1,035 Gweld pob un ...

English 608,146 French 96,623 German 89,152 Spanish 52,045 Italian 50,484 Russian 38,619 Arabic 12,442 Chinese 11,568 Portuguese 10,219 Polish 7,488 Turkish 6,092 Hebrew 5,123 Japanese 4,363 Ukrainian 4,016 Indonesian 3,679 Greek 2,919 Multiple 2,439 Korean 2,417 Czech 2,267 Dutch 2,057 Catalan 2,018 Persian 1,664 Vietnamese 1,624 Croatian 1,537 Hindi 1,287 Latin 1,254 Swedish 1,238 Bulgarian 1,211 Hungarian 1,197 Slovak 1,137 Gweld pob un ...

20th century 29,081 1900-1999 11,619 19th century 9,672 21st century 7,778 18th century 5,282 To 1500 4,721 1900 - 1999 4,176 1945- 3,570 17th century 3,386 16th century 3,212 1991- 2,934 2000-2099 2,581 1800-1899 2,555 20e siècle 1,841 1989- 1,795 1800-1999 1,741 Since 1945 1,614 1700-1799 1,593 1939-1945 1,445 Middle Ages, 600-1500 1,412 Since 1991 1,239 1960- 1,173 Geschichte 1,172 1800 - 1899 974 1990- 959 1900-2099 937 Medieval, 500-1500 889 1500-1599 834 Since 1989 811 1980- 774 Gweld pob un ...

United States 38,911 Europe 29,551 Italy 20,425 Germany 19,905 France 15,191 Russia (Federation) 14,903 India 10,894 China 10,403 Latin America 10,199 Spain 9,811 Africa 7,293 Asia 6,563 Soviet Union 6,414 Turkey 5,675 Poland 5,319 Great Britain 5,284 Mexico 5,106 European Union countries 4,912 Developing countries 4,838 Israel 4,653 Japan 4,627 Russia 4,621 Canada 4,319 Middle East 4,059 Greece 4,011 Indonesia 4,005 Brazil 3,901 Europe, Eastern 3,892 Rome 3,672 Ukraine 3,632 Gweld pob un ...