Revista 356,316 Publicació Periòdica 290,356 Document de govern 83,749 Electrònic 17,947 Llibre 17,762 Actes de congresos 4,553 Diari 4,505 Paquet 892 Material de referència 630 Article 479 Desconegut 411 Mapa 134 Thesis 100 Manuscrit 93 Capítol de llibre 68 Audio 35 Foto 20 Partitura 18 Objecte físic 16 veure tots ...

H - Ciències Socials 129,415 Q - Ciència 36,950 P - Filología i Literatura 33,858 T - Tecnologia 30,847 R - Medicina 25,824 K - Dret 23,319 D - Història mundial 23,026 B - Filosofia, Psicologia, Religió 20,308 L - Educació 16,272 N - Arts 15,231 Z - Biblioteconomia i Documentació 15,113 J - Ciències Polítiques 13,908 S - Agricultura 12,672 A - Treballs generalss 12,270 G - Geography, Anthropology, Recreation 10,429 M - Música 8,582 F - Història general d'Amèrica 8,331 E - Història d'Estats Units 6,292 C - Ciències Históriques 4,712 U - Ciència Militar 4,688 V - Ciència Naval 1,247 veure tots ...

Datamonitor (Firm) 6,942 Federal Financial Institutions Examination Council (U.S.) 6,719 United States Bureau of Labor Statistics 5,409 United States Bureau of the Census 4,603 Harris Collection of American Poetry and Plays (Brown University) Periodicals 4,147 Adam Matthew Digital (Firm) 4,146 Gotham Book Mart Collection (University of Pennsylvania) 3,107 Economist Intelligence Unit (Great Britain) 2,758 United States Internal Revenue Service 1,931 Mortgage Insurance Companies of America 1,904 Organisation for Economic Co-operation and Development 1,499 United States Bureau of Mines 1,230 United States Department of Agriculture. Economic Research Service 1,209 Vale Zines Collection (Beinecke Rare Book and Manuscript Library) 1,141 United States Agricultural Research Service 1,103 Geological Survey (U.S.) 1,068 Statistical Office of the European Communities 1,052 Institute of Electrical and Electronics Engineers 1,031 National Climatic Center 1,005 National Climatic Data Center (U.S.) 1,004 Edwin and Terry Murray Collection (David M. Rubenstein Rare Book & Manuscript Library) 983 International Monetary Fund 978 United States Joint Publications Research Service 859 United States Foreign Broadcast Information Service 779 Sallie Bingham Center for Women's History and Culture 680 United States World Agricultural Outlook Board 677 National Science Foundation (U.S.) 668 Julio Mario Santo Domingo Collection 661 Australian Bureau of Statistics 631 United States Foreign Agricultural Service 593 veure tots ...

20th century 13,925 1945- 3,992 1900-1999 3,294 21st century 3,168 19th century 3,001 1900 - 1999 2,743 18th century 2,426 Since 1945 1,696 Civil War, 1642-1649 1,149 1800-1899 1,066 2000-2099 1,011 1945-1989 923 1989- 894 1960- 866 Civil War, 1861-1865 689 Early works to 1800 667 1991- 663 1642-1649 648 1918-1945 586 Commonwealth and Protectorate, 1649-1660 560 1700-1799 470 1918- 466 1990- 464 1947- 439 1603-1800 411 17th century 389 1979- 387 1900-2099 378 1939-1945 373 1980- 359 veure tots ...

United States 114,498 Great Britain 17,560 New York (State) 14,389 Canada 13,546 India 11,431 California 10,958 Massachusetts 6,955 Australia 6,278 Europe 6,267 Nigeria 6,111 England 6,083 China 6,050 Pennsylvania 5,232 New York 5,224 Japan 4,897 North Carolina 4,277 Illinois 4,257 Africa 4,232 South Africa 4,112 Philippines 3,914 Asia 3,697 New Jersey 3,002 Texas 2,819 Ohio 2,701 Indonesia 2,645 Israel 2,595 Connecticut 2,422 Michigan 2,312 Latin America 2,245 Developing countries 2,172 veure tots ...