H - Social Science 3,047 P - Language and Literature 2,703 R - Medicine 1,923 Q - Science 1,607 B - Philosophy, Psychology, Religion 934 J - Political Science 868 D - World History 813 L - Education 783 E - United States History 708 T - Technology 530 F - General American History 427 K - Law 373 G - Geography, Anthropology, Recreation 310 S - Agriculture 206 N - Fine Arts 199 U - Military Science 163 Z - Library Science 118 C - Historical Sciences 80 M - Music 57 V - Naval Science 46 A - General Works 30 see all ...

ebrary, Inc 743 Project Muse 457 Resources for the Future 307 World Bank 228 Gotham Book Mart Collection (University of Pennsylvania) 150 American Council of Learned Societies 128 Inter-American Development Bank 117 ProQuest ebook central 111 Horace Howard Furness Memorial Library (University of Pennsylvania) 109 Johns Hopkins University 76 Edward Potts Cheyney Memorial Fund 67 EBSCOhost 59 Chinard, Gilbert, 1881-1972 55 Johns Hopkins University Institute of Law 53 Center for American Places 50 Maryland Geological Survey 44 Diamond, Larry Jay 40 Brookings Institution Institute for Government Research 38 Levitan, Sar A 38 Bickford, Charlene Bangs 35 International Food Policy Research Institute 35 Plattner, Marc F., 1945- 34 ProQuest (Firm) 34 Clawson, Marion, 1905-1998 33 Horace Howard Furness Memorial Fund 33 Lancaster, Henry Carrington, 1882-1954 33 Clark, William Bullock, 1860-1917 29 Marshall, Leon C (Leon Carroll), 1879-1966 29 Johns Hopkins University Foreign Policy Institute 27 Allen, Don Cameron, 1903-1972 26 see all ...

English 16,839 French 367 German 187 Undetermined 114 Latin 83 Spanish 74 Ancient Greek 70 Italian 64 Hebrew 48 Dutch 13 Greek 12 Danish 10 Russian 10 Aramaic 9 Multiple 9 Arabic 8 Chinese 8 Icelandic 7 Old English 7 Sanskrit 6 Akkadian 4 Japanese 4 Portuguese 4 Ancient Egyptian 3 Korean 3 Old French 3 Hungarian 2 Serbian 2 Swedish 2 Armenian 1 see all ...

History 2,987 Electronic books 1,912 Criticism, interpretation, etc 1,036 Biography 614 Biographies 530 Congresses 325 Conference papers and proceedings 296 Case studies 240 Popular works 206 Bibliography 150 Academic theses 135 Poetry 122 Sources 117 Congress 115 Fiction 106 Popular Works 99 Pictorial works 96 Translations into English 96 Popular Work 95 Bibliographies 83 Correspondence 77 reference 74 referencia 74 référence bibliographique 74 Translations 68 Miscellanea 66 Autobiographies 65 Early works to 1800 63 Guidebooks 60 Classification 58 see all ...

20th century 911 19th century 735 1900-1999 515 18th century 480 1800-1899 330 1900 - 1999 273 1700-1799 190 17th century 189 1800 - 1899 172 1945- 131 20e siècle 107 16th century 106 19e siècle 102 Colonial period, ca. 1600-1775 91 1945-1989 89 To 1500 89 1700 - 1799 87 1700-1899 82 21st century 80 Civil War, 1861-1865 77 1800-1999 73 Since 1945 72 18e siècle 65 20e siècle 63 1989- 57 To 1775 57 Early modern, 1500-1700 55 1775-1783 50 19e siècle 50 1700 - 1899 46 see all ...

United States 4,166 Maryland 504 Great Britain 468 États-Unis 373 France 347 Latin America 281 USA 260 Italy 243 États-Unis 243 England 239 Developing countries 222 Europe 211 Greece 181 Rome 181 New York (State) 146 Soviet Union 129 Germany 124 Baltimore 117 New York 116 Rome (Empire) 110 Southern States 109 China 105 Pennsylvania 92 Spain 92 Virginia 91 Japan 90 North America 89 Middle East 79 Washington (D.C.) 77 Mexico 76 see all ...