Book 51,090 Serial 28,451 Government Document 6,156 Journal 3,467 Electronic 1,006 Reference Material 664 Map 607 Conference Proceeding 361 Unknown 274 Kit 69 Article 24 Book Chapter 22 Thesis 21 Manuscript 20 Photo 9 Newspaper 5 Audio 2 Musical Score 1 see all ...

H - Social Science 17,547 Z - Library Science 5,360 L - Education 4,377 D - World History 3,924 J - Political Science 3,548 T - Technology 3,507 F - General American History 3,410 R - Medicine 2,244 P - Language and Literature 2,182 N - Fine Arts 2,130 K - Law 2,067 B - Philosophy, Psychology, Religion 1,873 Q - Science 1,597 G - Geography, Anthropology, Recreation 1,539 A - General Works 1,530 C - Historical Sciences 1,419 E - United States History 1,069 S - Agriculture 852 M - Music 827 U - Military Science 272 V - Naval Science 62 see all ...

Research Publications, inc 376 Royal College of Physicians of London 263 R.L. Polk & Co 228 Geo. A. Ogle & Co 185 Foundation Center 175 Gotham Book Mart Collection (University of Pennsylvania) 161 United States Central Intelligence Agency. Directorate of Intelligence 140 Peterson's Guides, Inc 136 United States Office of Education 135 United States Health Care Financing Administration 131 National Foreign Assessment Center (U.S.) 127 United States Central Intelligence Agency 120 Athenaeum of Philadelphia 115 National Center for Education Statistics 97 Educational Resources Information Center (U.S.) 94 Longworth, David, 1765?-1821 94 Gale Research Company 92 Gale Research Inc 90 Council of State Governments 88 Peterson's (Firm) 88 ebrary, Inc 87 United States Office of Educational Research and Improvement 80 United States Postal Service Address Information Systems Division 80 Organisation for Economic Co-operation and Development Development Centre 79 Adam Matthew Digital (Firm) 78 Technical Assistance Information Clearing House 76 American Medical Association 73 Unesco Science Cooperation Office for Latin America 73 United States Administration on Aging 73 Robinson, James 71 see all ...

English 63,867 French 3,505 German 3,205 Spanish 2,672 Japanese 2,433 Russian 2,303 Chinese 2,286 Italian 815 Indonesian 704 Arabic 690 Korean 676 Hebrew 578 Portuguese 562 Thai 385 Ukrainian 384 Dutch 334 Polish 315 Vietnamese 272 Czech 211 Turkish 161 Swedish 152 Multiple 148 Hungarian 133 Persian 132 Croatian 122 Danish 88 Lithuanian 81 Greek 76 Slovak 74 Hindi 73 see all ...

20th century 954 19th century 468 1900-1999 326 Early works to 1800 212 18th century 200 21st century 171 1991- 165 1945- 140 1900 - 1999 117 Civil War, 1861-1865 104 1800-1899 97 Since 1991 84 1939-1945 76 1861-1865 65 17th century 60 Since 1945 56 2000-2099 47 1976- 45 1951- 39 1990- 38 1960- 37 1989- 37 1700-1799 34 1800 - 1899 33 1800-1999 33 20e siècle 33 1939 - 1945 32 1949- 31 1796 29 1800 29 see all ...