Book 3,164,912 Government Document 246,018 Electronic 183,812 Serial 147,114 Journal 85,405 Conference Proceeding 75,491 Thesis 41,091 Unknown 31,305 Audio 4,427 Kit 2,187 Reference Material 2,032 Manuscript 1,782 Book Chapter 1,774 Newspaper 875 Photo 827 Musical Score 337 Map 289 Article 69 Physical Object 51 see all ...

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English 2,182,625 French 232,211 Spanish 210,907 German 207,959 Chinese 118,511 Russian 113,610 Japanese 86,370 Italian 77,399 Portuguese 47,643 Korean 34,327 Arabic 32,272 Indonesian 27,438 Polish 22,290 Dutch 18,424 Turkish 13,976 Swedish 12,160 Hebrew 11,078 Vietnamese 9,929 Czech 6,692 Thai 6,366 Ukrainian 6,153 Danish 6,151 Hungarian 5,843 Persian 5,725 Greek 5,325 Croatian 5,097 Hindi 4,789 Norwegian 4,245 Romanian 3,991 Bulgarian 3,667 see all ...

History 232,626 Periodicals 182,449 Electronic books 174,389 Statistics 141,205 Congresses 112,152 Conference papers and proceedings 79,864 Biography 67,684 Case studies 52,416 Biographies 40,398 Directories 20,550 Dictionaries 20,243 Handbooks, manuals, etc 17,416 Early works to 1800 16,569 Sources 15,971 Academic theses 13,291 Bibliography 11,244 Handbooks and manuals 11,003 Early works 9,827 Census data 8,757 Interviews 8,613 Pictorial works 8,095 Documentary films 7,684 Autobiographies 7,332 Technical reports 7,028 Bibliographies 6,395 Thèses et écrits académiques 5,935 Cross-cultural studies 5,739 bibliography 5,655 reference 5,654 referencia 5,654 see all ...

20th century 88,624 21st century 46,375 1900-1999 36,018 19th century 35,067 1945- 34,780 2000-2099 19,132 Since 1945 15,501 18th century 14,413 1991- 12,680 1900 - 1999 12,130 1800-1899 11,669 1976-2000 9,315 2000- 8,434 1918-1945 8,364 1989- 8,273 17th century 7,427 20e siècle 6,996 1960- 6,893 1918- 6,806 1818-1883 6,298 Since 1991 6,203 Early works to 1800 5,807 1990- 5,792 1976- 5,423 21e siècle 5,094 1800-1999 4,938 1700-1799 4,777 Since 2000 4,332 To 1500 4,207 2000 - 2099 4,170 see all ...

United States 506,701 China 120,288 Great Britain 104,082 Japan 81,730 France 75,195 India 73,469 Germany 68,776 Europe 58,809 Soviet Union 49,698 Italy 47,008 Developing countries 40,181 Brazil 36,395 Russia (Federation) 35,820 Mexico 34,484 Canada 33,970 Indonesia 32,746 Latin America 29,948 Spain 29,783 England 28,957 Korea (South) 27,301 Argentina 22,827 New York (State) 22,627 Africa 21,038 California 20,008 Poland 19,486 Germany (West) 18,322 European Union countries 18,121 Asia 17,655 Turkey 17,561 Australia 17,012 see all ...