Book 1,085,515 Thesis 139,200 Conference Proceeding 106,636 Government Document 65,749 Electronic 42,316 Journal 25,880 Serial 23,807 Unknown 7,291 Kit 4,343 Manuscript 1,171 Photo 1,061 Audio 908 Book Chapter 610 Reference Material 336 Map 171 Newspaper 102 Musical Score 98 Physical Object 41 Article 10 see all ...

SpringerLink (Online service) 19,016 Adam Matthew Digital (Firm) 14,309 Society of Photo-optical Instrumentation Engineers 11,837 Massachusetts Institute of Technology Department of Electrical Engineering and Computer Science 10,710 Institute of Electrical and Electronics Engineers 9,618 ebrary, Inc 9,377 IEEE Xplore (Online service) 9,132 Massachusetts Institute of Technology Department of Mechanical Engineering 8,789 Culinary Collection (University of Pennsylvania) 8,081 United States Bureau of Mines 6,209 ProQuest (Firm) 5,953 Sloan School of Management 5,811 United States National Aeronautics and Space Administration 5,791 Chef Fritz Blank Culinary Archive and Library (University of Pennsylvania) 5,735 Laurie Burrows Grad Collection (University of Pennsylvania) 5,317 Langley Research Center 4,089 Society of Photo-Optical Instrumentation Engineers 3,574 SPIE (Society) 2,927 National Research Council (U.S.) Transportation Research Board 2,856 Geological Survey (U.S.) 2,812 United States General Accounting Office 2,639 Lewis Research Center 2,628 IEEE Computer Society 2,568 Massachusetts Institute of Technology Department of Aeronautics and Astronautics 2,510 United States Federal Highway Administration 2,279 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 989,601 German 48,403 French 42,524 Russian 21,437 Spanish 21,129 Chinese 15,335 Italian 14,288 Japanese 12,163 Portuguese 5,099 Dutch 3,813 Korean 3,685 Polish 2,619 Indonesian 2,379 Arabic 1,914 Czech 1,884 Hebrew 1,838 Swedish 1,819 Vietnamese 1,812 Turkish 1,788 Multiple 1,412 Thai 1,188 Hungarian 1,016 Latin 937 Undetermined 917 Persian 909 Danish 891 Greek 819 Ukrainian 716 Finnish 701 Catalan 698 see all ...

Congresses 126,978 Conference papers and proceedings 89,753 Electronic books 81,743 Periodicals 37,156 History 36,466 Exhibitions 29,615 Pictorial works 27,644 Cookbooks 18,985 Exhibition catalogs 18,717 Handbooks, manuals, etc 17,479 Technical reports 15,693 Biography 15,251 Handbooks and manuals 12,279 Catalogs 11,291 Biographies 9,267 Dictionaries 8,720 Livres de cuisine 6,973 cookbooks 6,909 Illustrated works 5,403 Directories 5,016 Congrès 4,766 Portraits 4,681 Electronic journals 4,573 Photobooks 4,551 Statistics 4,275 Early works to 1800 3,998 Cookbook 3,748 Academic theses 3,265 Juvenile literature 3,051 Bibliography 3,004 see all ...

20th century 13,776 19th century 6,003 21st century 5,200 1900-1999 4,593 2000-2099 2,476 1800-1899 1,488 1900 - 1999 1,218 Early works to 1800 1,162 20e siècle 997 18th century 903 1800-1999 694 21e siècle 621 1946- 610 1945- 607 1938- 588 1944- 586 1955- 584 1952- 570 1964- 566 1900-2099 563 To 1500 560 1949- 545 1953- 532 1958- 525 1957- 520 1954- 518 1951- 484 1961- 471 1950- 462 17th century 461 see all ...

United States 62,209 Great Britain 11,043 China 10,321 France 10,209 Japan 10,037 Germany 9,010 California 7,108 Italy 6,841 India 6,173 New York (State) 5,753 England 5,522 Soviet Union 4,804 Europe 4,482 Canada 4,220 Mexico 3,787 Massachusetts 3,484 Russia (Federation) 3,439 New York 3,427 Indonesia 3,327 Spain 3,209 Australia 3,136 Brazil 3,132 Pennsylvania 3,046 Developing countries 2,149 Russia 2,142 London 2,130 Netherlands 2,104 Illinois 1,996 Korea (South) 1,918 Turkey 1,859 see all ...