Book 2,040,363 Thesis 206,650 Conference Proceeding 133,350 Government Document 118,784 Electronic 96,285 Serial 72,111 Journal 54,457 Unknown 37,532 Audio 23,201 Kit 19,786 Book Chapter 13,314 Map 12,539 Musical Score 10,098 Manuscript 5,189 Reference Material 3,825 Newspaper 2,734 Photo 2,462 Physical Object 143 Article 123 see all ...

H - Social Science 309,540 T - Technology 258,862 Q - Science 142,642 D - World History 134,870 N - Fine Arts 119,270 P - Language and Literature 116,744 K - Law 90,660 B - Philosophy, Psychology, Religion 80,485 G - Geography, Anthropology, Recreation 68,198 J - Political Science 63,107 L - Education 53,690 R - Medicine 49,458 M - Music 31,254 S - Agriculture 29,612 Z - Library Science 28,477 E - United States History 24,352 F - General American History 23,266 C - Historical Sciences 16,124 U - Military Science 16,038 A - General Works 15,679 V - Naval Science 4,951 see all ...

Institute of Electrical and Electronics Engineers 35,692 Adam Matthew Digital (Firm) 25,624 Inter-university Consortium for Political and Social Research 13,761 Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 11,556 De Gruyter 11,326 Massachusetts Institute of Technology Department of Mechanical Engineering 9,562 IEEE Xplore (Online service) 8,733 International Monetary Fund 8,224 ebrary, Inc 8,119 Sloan School of Management 7,393 United States National Bureau of Standards 7,261 SpringerLink (Online service) 7,041 Federal Financial Institutions Examination Council (U.S.) 6,745 Practising Law Institute 6,559 National Institute of Standards and Technology (U.S.) 6,249 Recorded Anthology of American Music, Inc 6,018 National Institutes of Health (U.S.) 4,960 American and French Research on the Treasury of the French Language (Project) 4,893 Committee on Institutional Cooperation 4,779 Smithsonian Institution 4,348 Indiana University Digital Library Program 4,284 Organisation for Economic Co-operation and Development 4,252 National Institute of Education (U.S.) 4,152 United States National Aeronautics and Space Administration 3,585 Massachusetts Institute of Technology Department of Architecture 3,575 National Institute of Justice (U.S.) 3,567 Harvard University Graduate School of Arts and Sciences 3,453 American Society for Testing and Materials 3,437 Taylor & Francis eBooks 3,429 Taylor & Francis 3,421 see all ...

English 1,684,846 Russian 177,263 French 146,422 German 137,845 Spanish 35,016 Italian 24,973 Latin 21,015 Chinese 15,862 Hebrew 14,071 No linguistic content 12,520 Dutch 9,823 Portuguese 9,423 Japanese 8,870 Undetermined 8,020 Arabic 7,640 Polish 6,270 Multiple 6,096 Indonesian 5,853 Croatian 5,102 Bulgarian 5,098 Danish 5,007 Korean 4,484 Catalan 4,362 Yiddish 3,791 Armenian 3,505 Ukrainian 3,358 Czech 3,236 Sanskrit 3,045 Swedish 2,924 Greek 2,846 see all ...

Congresses 179,755 Conference papers and proceedings 124,790 History 123,504 Electronic books 110,406 Exhibitions 97,571 Periodicals 78,621 Exhibition catalogs 74,621 Academic theses 41,306 Technical reports 33,999 Biography 31,890 Criticism, interpretation, etc 28,728 Bibliography 27,860 Statistics 25,825 Early works to 1800 25,666 Biographies 20,327 Catalogs 20,030 Correspondence 18,980 Dictionaries 16,571 Expositions 16,536 Sources 15,130 Records (Documents) 14,048 Maps 13,949 Internet videos 13,894 Case studies 13,388 Bibliographies 12,005 exhibition catalogs 11,711 Catalogues d'exposition 11,633 Directories 10,859 Nonfiction films 10,180 Congress 9,649 see all ...

20th century 71,831 21st century 32,991 1900-1999 29,559 19th century 27,194 2000-2099 14,257 Early works to 1800 12,444 18th century 9,862 1945- 9,856 1900 - 1999 9,363 20e siècle 8,102 1750-1806 7,916 1800-1899 7,522 17th century 7,260 16th century 6,752 1991- 5,928 21e siècle 5,641 Since 1945 4,844 1900-2099 4,807 1989- 4,778 1939-1945 4,131 1800-1999 4,112 To 1500 3,685 1960- 3,256 Since 1991 3,088 Revolution, 1917-1921 3,053 1700-1799 2,832 19e siècle 2,506 1800 - 1899 2,401 1945-1989 2,375 Since 1989 2,299 see all ...

United States 231,435 Soviet Union 40,304 Russia (Federation) 40,259 France 38,227 Europe 36,933 Germany 36,732 Great Britain 31,399 China 30,846 India 29,071 Italy 18,185 Russia 17,926 Japan 16,384 Canada 15,669 Africa 13,620 Developing countries 12,313 England 12,278 New York (State) 12,048 Asia 10,493 European Union countries 10,493 Israel 10,305 California 9,669 Massachusetts 9,197 Latin America 9,060 Indonesia 8,910 États-Unis 8,834 Spain 8,762 Middle East 8,379 Mexico 8,239 Poland 8,204 South Africa 8,113 see all ...