Llyfr 46,245 Cylchgrawn 6,662 Cyfresol 5,404 Pennod Llyfr 1,024 Trafodyn Cynhadledd 889 Traethawd Ymchwil 638 Dogfen y Llywodraeth 276 Electronig 105 Anhysbys 27 Sgôr Cerddorol 20 Deunydd Cyfeirio 20 Sain 9 Cit 5 Llawysgrif 5 Erthygl 3 Llun 1 Gweld pob un ...

A - Gwaith Cyffredinol 59,422 P - Iaith a Llenyddiaeth 1

Rand Corporation 2,268 Unesco 265 Kongelige Danske videnskabernes selskab 200 British Academy 171 David E. Pingree Collection (Brown University) 124 Accademia nazionale dei Lincei 116 United States Defense Advanced Research Projects Agency 116 United States Air Force 112 American Academy of Arts and Letters 109 National Science Foundation (U.S.) 105 Istituto veneto di scienze, lettere ed arti 102 Bellman, Richard, 1920-1984 97 Akademii︠a︡ nauk SSSR 92 Österreichische Akademie der Wissenschaften 83 New York City-Rand Institute 80 United States Joint Publications Research Service 71 Akademie der Wissenschaften und der Literatur (Germany) 69 Österreichische Akademie der Wissenschaften 68 Foundation Center 67 Srpska akademija nauka i umetnosti 67 U.S. National Commission for UNESCO 66 United States Department of Energy 64 Tartu Riiklik Ülikool 61 United States Department of Housing and Urban Development. Office of Policy Development and Research 61 Miklosich, Franz, Ritter von, 1813-1891 59 Union of International Associations 59 Carnegie Institution of Washington 58 Ford Foundation 58 Fiske Icelandic Collection 56 Newhouse, Joseph P 56 Gweld pob un ...

English 20,669 German 14,390 French 6,441 Chinese 3,374 Russian 2,856 Italian 2,817 Swedish 1,939 Spanish 1,611 Dutch 1,304 Japanese 1,236 Polish 1,031 Czech 894 Latin 723 Arabic 626 Danish 439 Ukrainian 421 Norwegian 389 Portuguese 384 Croatian 312 Serbian 309 Korean 296 Greek 289 Ancient Greek 286 Multiple 240 Hungarian 232 Afrikaans 199 Turkish 194 Estonian 148 Finnish 139 Bulgarian 122 Gweld pob un ...

Periodicals 6,052 History 4,432 Criticism, interpretation, etc 1,622 Congresses 1,605 Conference papers and proceedings 1,257 Biography 932 Bibliography 834 Directories 804 Sources 664 Biographies 613 Catalogs 454 Bibliographies 393 Dictionaries 313 Abstracts 253 Academic theses 227 Texts 224 Early works to 1800 219 Early works 198 Electronic journals 192 Festschriften 177 Indexes 172 Thèses et écrits académiques 159 Periodical 154 Handbooks, manuals, etc 148 Périodiques 137 Electronic books 126 Directory 125 Church history 123 Terminology 107 Correspondence 102 Gweld pob un ...

20th century 819 19th century 432 1900-1999 372 18th century 274 To 1500 205 1800-1899 158 1564-1616 146 17th century 135 16th century 134 1900 - 1999 109 1700-1799 93 1749-1832 89 1945- 82 21st century 82 Revolution, 1789-1799 78 Middle Ages, 600-1500 71 1800-1999 65 1800 - 1899 64 Early works to 1800 63 1868-1955 53 Geschichte 52 Middle High German, 1050-1500 52 20e siècle 50 1500-1599 48 30-600 48 Early church, ca. 30-600 47 1724-1804 46 1483-1546 45 Early modern, 1500-1700 45 Primitive and early church, ca. 30-600 45 Gweld pob un ...

United States 2,252 Germany 1,310 China 1,200 France 1,062 Italy 949 Europe 827 Soviet Union 789 Greece 686 Japan 588 Austria 535 Sweden 527 Poland 520 Rome 487 Egypt 410 Russia (Federation) 393 Great Britain 389 Turkey 386 Spain 354 Belgium 333 Netherlands 313 Yugoslavia 275 India 265 Czechoslovakia 249 Rome (Empire) 248 Russia 244 California 230 Asia 224 Ukraine 223 Serbia 219 Norway 212 Gweld pob un ...