Llyfr 113,088 Dogfen y Llywodraeth 3,991 Traethawd Ymchwil 3,432 Cylchgrawn 3,142 Trafodyn Cynhadledd 2,704 Pennod Llyfr 2,509 Electronig 1,862 Cyfresol 1,783 Anhysbys 889 Sain 160 Cit 57 Llawysgrif 43 Deunydd Cyfeirio 34 Llun 25 Map 13 Gwrthrych Ffisegol 5 Sgôr Cerddorol 2 Erthygl 1 Papur Newydd 1 Gweld pob un ...

Q - Gwyddoniaeth 121,658

ebrary, Inc 807 De Gruyter 703 Zoological Survey of India 664 William B. Provine Collection on Evolution and Genetics 606 U.S. Fish and Wildlife Service 548 Smithsonian Institution 516 Academy of Natural Sciences of Philadelphia 505 American Ornithologists' Union 482 ProQuest (Firm) 474 Cornell University Laboratory of Ornithology 404 SpringerLink (Online service) 402 British Museum (Natural History) Department of Zoology 321 Audubon, John James, 1785-1851 249 National Audubon Society 244 Smithsonian Institution Press 237 United States Department of Agriculture 237 EBSCOhost 227 Zoological Society of London 225 British Museum (Natural History) 202 History of Medicine Collection (David M. Rubenstein Rare Book & Manuscript Library) 201 Gudger, E. W (Eugene Willis), 1866-1956 197 Clarence J. Marshall Memorial Library Fund 174 Canadian Science Advisory Secretariat 163 History of Science Collection (Brown University) 162 Lownes Science Collection (Brown University) 153 Elliot, Daniel Giraud, 1835-1915 143 Jordan, David Starr, 1851-1931 138 United States National Marine Fisheries Service 136 Peterson, Roger Tory, 1908-1996 134 Gotham Book Mart Collection (University of Pennsylvania) 132 Gweld pob un ...

English 94,014 German 9,812 French 8,061 Spanish 3,001 Russian 2,462 Latin 1,881 Chinese 1,581 Italian 1,171 Japanese 1,167 Portuguese 944 Dutch 610 Danish 388 Swedish 313 Arabic 298 Korean 295 Polish 286 Indonesian 245 Undetermined 219 Czech 213 Multiple 169 Hebrew 167 Thai 167 Vietnamese 138 Norwegian 118 Turkish 108 Ancient Greek 106 Hungarian 83 Finnish 75 Greek 68 Hindi 62 Gweld pob un ...

Classification 5,254 Identification 5,241 Electronic books 4,847 Pictorial works 4,037 Periodicals 4,022 Guidebooks 3,498 Congresses 3,340 Field guides 2,880 Conference papers and proceedings 2,547 Juvenile literature 2,519 Biography 1,543 History 1,493 Juvenile works 1,285 Academic theses 1,212 Dictionaries 1,158 Catalogs and collections 917 Biographies 880 Thèses et écrits académiques 877 Early works to 1800 856 Bibliography 837 Anecdotes 772 Early works 751 Congress 738 Folklore 717 Atlases 706 Periodical 705 Terminology 680 Laboratory manuals 639 Catalogs 595 Nomenclature 572 Gweld pob un ...

19th century 306 1785-1851 281 Early works to 1800 199 20th century 168 1800-1899 86 18th century 78 17th century 59 1900-1999 59 1823-1915 53 To 1500 51 1934- 45 1787-1874 44 1769-1832 42 21st century 35 1804-1881 34 1766-1813 32 Cretaceous 31 1949- 29 Tertiary 29 1800 - 1899 25 Miocene 25 1647-1717 24 1903-1989 23 Pleistocene 23 1700-1799 22 Geschichte 22 1925-1995 21 1809-1882 20 Quaternary 20 Triassic 20 Gweld pob un ...

North America 3,646 United States 3,229 Great Britain 2,283 India 2,276 Australia 1,894 Europe 1,532 China 1,188 Africa 1,057 Japan 1,051 California 1,030 Canada 1,009 Mexico 905 Brazil 723 France 689 England 666 South Africa 666 New Zealand 639 Germany 629 South America 580 Alaska 577 Indonesia 535 Pacific Ocean 513 Florida 512 Soviet Union 485 Africa, Southern 481 Italy 463 New York (State) 459 Asia 456 Russia (Federation) 434 Texas 427 Gweld pob un ...