Book 1,081,936 Thesis 139,184 Conference Proceeding 106,087 Government Document 65,676 Electronic 42,281 Journal 25,839 Serial 23,783 Unknown 7,252 Kit 4,343 Manuscript 1,168 Photo 1,052 Audio 899 Book Chapter 606 Reference Material 338 Map 171 Newspaper 102 Musical Score 98 Physical Object 41 Article 10 see all ...

SpringerLink (Online service) 18,748 Adam Matthew Digital (Firm) 14,309 Society of Photo-optical Instrumentation Engineers 11,851 Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 10,710 ebrary, Inc 9,384 Institute of Electrical and Electronics Engineers 9,306 IEEE Xplore (Online service) 9,124 Massachusetts Institute of Technology Department of Mechanical Engineering 8,789 Culinary Collection (University of Pennsylvania) 8,078 United States Bureau of Mines 6,207 ProQuest (Firm) 5,986 Sloan School of Management 5,811 United States National Aeronautics and Space Administration 5,784 Chef Fritz Blank Culinary Archive and Library (University of Pennsylvania) 5,734 Laurie Burrows Grad Collection (University of Pennsylvania) 5,317 Langley Research Center 4,089 Society of Photo-Optical Instrumentation Engineers 3,517 SPIE (Society) 2,923 National Research Council (U.S.) Transportation Research Board 2,854 Geological Survey (U.S.) 2,810 United States General Accounting Office 2,637 Lewis Research Center 2,628 IEEE Computer Society 2,542 Massachusetts Institute of Technology Department of Aeronautics and Astronautics 2,510 United States Federal Highway Administration 2,261 Massachusetts Institute of Technology Department of Physics 2,176 Massachusetts Institute of Technology Department of Materials Science and Engineering 2,152 Massachusetts Institute of Technology Department of Urban Studies and Planning 2,110 Massachusetts Institute of Technology Department of Civil and Environmental Engineering 1,885 American Society for Testing and Materials 1,786 see all ...

English 986,504 German 48,259 French 42,375 Russian 21,294 Spanish 20,808 Chinese 15,230 Italian 14,210 Japanese 12,092 Portuguese 5,062 Dutch 3,791 Korean 3,650 Polish 2,603 Indonesian 2,352 Arabic 1,897 Czech 1,881 Hebrew 1,807 Swedish 1,806 Vietnamese 1,805 Turkish 1,773 Multiple 1,400 Thai 1,184 Hungarian 1,014 Latin 931 Undetermined 915 Persian 905 Danish 884 Greek 811 Ukrainian 711 Finnish 699 Catalan 690 see all ...

Congresses 126,426 Conference papers and proceedings 89,441 Electronic books 82,244 Periodicals 37,078 History 36,120 Exhibitions 29,443 Pictorial works 27,422 Cookbooks 18,847 Exhibition catalogs 18,572 Handbooks, manuals, etc 17,447 Technical reports 15,682 Biography 15,169 Handbooks and manuals 12,237 Catalogs 11,254 Biographies 9,164 Dictionaries 8,704 Livres de cuisine 6,853 cookbooks 6,790 Illustrated works 5,379 Directories 5,004 Congrès 4,730 Portraits 4,647 Photobooks 4,424 Statistics 4,268 Early works to 1800 3,982 Cookbook 3,694 Electronic journals 3,560 Juvenile literature 3,034 Bibliography 2,998 Academic theses 2,934 see all ...

20th century 13,689 19th century 5,980 21st century 5,120 1900-1999 4,543 2000-2099 2,426 1800-1899 1,475 1900 - 1999 1,216 Early works to 1800 1,161 20e siècle 905 18th century 894 1800-1999 687 1945- 609 1946- 600 1944- 585 1938- 582 1955- 577 1952- 567 1964- 562 21e siècle 554 1900-2099 553 To 1500 553 1949- 543 1953- 528 1958- 521 1957- 518 1954- 516 1951- 484 1961- 470 17th century 460 1950- 458 see all ...

United States 62,058 Great Britain 11,013 China 10,237 France 10,173 Japan 9,983 Germany 8,968 California 7,089 Italy 6,825 India 6,151 New York (State) 5,743 England 5,490 Soviet Union 4,786 Europe 4,465 Canada 4,213 Mexico 3,766 Massachusetts 3,472 New York 3,423 Russia (Federation) 3,321 Indonesia 3,297 Spain 3,187 Australia 3,129 Brazil 3,121 Pennsylvania 3,043 Developing countries 2,146 Russia 2,136 London 2,119 Netherlands 2,102 Illinois 1,995 Korea (South) 1,896 Turkey 1,846 see all ...