Book 1,147,026 Thesis 139,253 Conference Proceeding 112,203 Government Document 65,876 Electronic 59,038 Journal 26,671 Serial 24,010 Unknown 8,171 Kit 4,372 Manuscript 1,275 Photo 1,082 Audio 941 Book Chapter 617 Reference Material 338 Map 173 Musical Score 98 Newspaper 63 Physical Object 41 Article 14 see all ...

Institute of Electrical and Electronics Engineers 20,595 SpringerLink (Online service) 17,630 Adam Matthew Digital (Firm) 14,302 Society of Photo-optical Instrumentation Engineers 14,155 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 8,789 Culinary Collection (University of Pennsylvania) 8,091 United States Bureau of Mines 6,227 ProQuest (Firm) 5,956 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) 5,745 Laurie Burrows Grad Collection (University of Pennsylvania) 5,314 Society of Photo-Optical Instrumentation Engineers 4,540 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 2,303 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 1,051,747 German 49,247 French 43,387 Russian 21,628 Spanish 21,504 Chinese 15,476 Italian 14,399 Japanese 12,457 Portuguese 5,174 Korean 3,861 Dutch 3,850 Polish 2,648 Indonesian 2,397 Arabic 1,938 Czech 1,913 Hebrew 1,860 Swedish 1,835 Turkish 1,819 Vietnamese 1,818 Multiple 1,420 Thai 1,192 Hungarian 1,024 Latin 940 Undetermined 928 Persian 917 Danish 899 Greek 833 Ukrainian 731 Catalan 705 Finnish 705 see all ...

Congresses 144,592 Conference papers and proceedings 90,048 Electronic books 76,263 Periodicals 38,105 History 36,870 Exhibitions 29,825 Pictorial works 27,897 Cookbooks 19,239 Exhibition catalogs 18,900 Handbooks, manuals, etc 18,248 Technical reports 15,736 Biography 15,561 Handbooks and manuals 12,340 Catalogs 11,371 Biographies 9,389 Dictionaries 8,778 Livres de cuisine 7,094 cookbooks 7,031 Illustrated works 5,444 Directories 5,040 Congrès 4,761 Portraits 4,734 Photobooks 4,648 Statistics 4,335 Early works to 1800 3,970 Cookbook 3,796 Juvenile literature 3,438 Academic theses 3,303 Bibliography 3,014 Case studies 2,990 see all ...

20th century 14,119 19th century 6,101 21st century 5,299 1900-1999 4,677 2000-2099 2,518 1800-1899 1,516 1900 - 1999 1,220 Early works to 1800 1,157 20e siècle 1,048 18th century 920 1800-1999 709 21e siècle 653 1946- 621 1945- 613 1944- 591 1955- 590 1938- 585 To 1500 579 1952- 577 1964- 570 1900-2099 563 1949- 553 1953- 538 1958- 527 1957- 525 1954- 524 1951- 486 1961- 478 1966- 468 17th century 467 see all ...

United States 63,688 Great Britain 11,845 China 10,496 France 10,379 Japan 10,255 Germany 9,119 California 7,170 Italy 6,886 India 6,232 New York (State) 5,821 England 5,570 Soviet Union 4,873 Europe 4,632 Canada 4,269 Mexico 3,850 Massachusetts 3,516 Russia (Federation) 3,491 New York 3,464 Indonesia 3,345 Spain 3,266 Australia 3,182 Brazil 3,170 Pennsylvania 3,068 South Africa 3,046 Developing countries 2,187 Russia 2,162 London 2,147 Netherlands 2,134 Illinois 2,021 Korea (South) 1,962 see all ...