Book 1,148,103 Thesis 139,256 Conference Proceeding 112,238 Government Document 65,908 Electronic 59,098 Journal 26,678 Serial 24,016 Unknown 7,560 Kit 4,372 Manuscript 1,277 Photo 1,083 Audio 943 Book Chapter 618 Reference Material 337 Map 176 Musical Score 98 Newspaper 63 Physical Object 41 Article 14 see all ...

Institute of Electrical and Electronics Engineers 20,593 SpringerLink (Online service) 17,630 Adam Matthew Digital (Firm) 14,302 Society of Photo-optical Instrumentation Engineers 14,149 Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 10,712 IEEE Xplore (Online service) 9,177 ebrary, Inc 8,798 Massachusetts Institute of Technology Department of Mechanical Engineering 8,790 Culinary Collection (University of Pennsylvania) 8,092 United States Bureau of Mines 6,228 ProQuest (Firm) 5,958 United States National Aeronautics and Space Administration 5,812 Sloan School of Management 5,811 Chef Fritz Blank Culinary Archive and Library (University of Pennsylvania) 5,746 Laurie Burrows Grad Collection (University of Pennsylvania) 5,315 Society of Photo-Optical Instrumentation Engineers 4,545 AM (Publisher) 4,211 Langley Research Center 4,093 SPIE (Society) 3,287 IEEE Computer Society 2,959 National Research Council (U.S.) Transportation Research Board 2,868 Geological Survey (U.S.) 2,809 Society of Photo Optical Instrumentation Engineers 2,677 United States General Accounting Office 2,638 Lewis Research Center 2,628 Massachusetts Institute of Technology Department of Aeronautics and Astronautics 2,510 United States Federal Highway Administration 2,326 Massachusetts Institute of Technology Department of Physics 2,176 Massachusetts Institute of Technology Department of Materials Science and Engineering 2,153 Massachusetts Institute of Technology Department of Urban Studies and Planning 2,110 see all ...

English 1,051,980 German 49,313 French 43,444 Russian 21,636 Spanish 21,546 Chinese 15,511 Italian 14,435 Japanese 12,485 Portuguese 5,188 Korean 3,878 Dutch 3,854 Polish 2,655 Indonesian 2,408 Arabic 1,944 Czech 1,917 Hebrew 1,866 Swedish 1,840 Turkish 1,829 Vietnamese 1,820 Multiple 1,420 Thai 1,193 Hungarian 1,023 Latin 942 Undetermined 930 Persian 917 Danish 903 Greek 837 Ukrainian 731 Catalan 706 Finnish 706 see all ...

Congresses 144,619 Conference papers and proceedings 90,091 Electronic books 75,514 Periodicals 38,115 History 36,961 Exhibitions 29,905 Pictorial works 28,003 Cookbooks 19,272 Exhibition catalogs 18,948 Handbooks, manuals, etc 18,273 Technical reports 15,785 Biography 15,596 Handbooks and manuals 12,397 Catalogs 11,382 Biographies 9,424 Dictionaries 8,784 Livres de cuisine 7,120 cookbooks 7,056 Illustrated works 5,451 Directories 5,041 Congrès 4,770 Portraits 4,752 Photobooks 4,725 Statistics 4,337 Early works to 1800 3,976 Cookbook 3,809 Juvenile literature 3,440 Academic theses 3,341 Bibliography 3,015 Case studies 2,995 see all ...

20th century 14,157 19th century 6,106 21st century 5,328 1900-1999 4,705 2000-2099 2,526 1800-1899 1,527 1900 - 1999 1,220 Early works to 1800 1,157 20e siècle 1,082 18th century 918 1800-1999 710 21e siècle 666 1946- 621 1945- 615 1944- 593 1955- 590 1938- 586 To 1500 582 1952- 577 1964- 577 1900-2099 564 1949- 555 1953- 540 1958- 529 1954- 527 1957- 525 1951- 486 1961- 479 17th century 469 1966- 469 see all ...

United States 63,744 Great Britain 11,856 China 10,526 France 10,389 Japan 10,277 Germany 9,136 California 7,171 Italy 6,907 India 6,243 New York (State) 5,824 England 5,568 Soviet Union 4,876 Europe 4,643 Canada 4,275 Mexico 3,855 Massachusetts 3,514 Russia (Federation) 3,493 New York 3,461 Indonesia 3,353 Spain 3,271 Australia 3,189 Brazil 3,175 Pennsylvania 3,067 South Africa 3,052 Developing countries 2,189 Russia 2,161 London 2,145 Netherlands 2,135 Illinois 2,022 Korea (South) 1,973 see all ...