Bibliography 120,946
History 54,353
Sources 16,727
Catalogs 15,873
Periodicals 12,832
History and criticism 10,924
Rare books 7,018
Manuscripts 6,470
Archives 6,227
Music 6,141
Government publications 5,741
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Imprints 5,381
Early printed books 4,848
Study and teaching 4,815
Politics and government 4,742
Libraries 4,628
Dissertations, Academic 4,610
Science 4,598
Research 4,535
Printing 4,417
Incunabula 4,040
Education 3,943
Biography 3,635
Economic conditions 3,561
English literature 3,557
Medicine 3,482
Criticism and interpretation 3,405
Books 3,158
Maps 3,018
Bibliographie 2,916
Children's literature 2,866
Geology 2,795
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Women 2,672
American literature 2,598
Jews 2,543
Booksellers' catalogs 2,537
Social sciences 2,497
Antiquities 2,478
Indexes 2,403
Civilization 2,355
Books and reading 2,318
Church history 2,247
Social conditions 2,222
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Literature 2,164
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Chinese literature 2,118
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Art 2,089
Private libraries 2,043
Reference books 2,023
German literature 2,020
Philosophy 1,989
Political science 1,936
Union catalogs 1,930
Economics 1,923
Histoire 1,913
Exhibitions 1,722
Bibliography of bibliographies 1,689
Publishers and publishing 1,667
Bio-bibliography 1,648
Russian literature 1,632
Economic history 1,618
Children 1,605
French literature 1,604
Foreign relations 1,596
World War, 1939-1945 1,541
Directories 1,515
Statistics 1,515
History, Local 1,508
Publishers' catalogs 1,493
City planning 1,490
Historiography 1,481
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Description and travel 1,466
Union lists 1,449
Intellectual life 1,445
Ethnology 1,414
Genealogy 1,389
Theater 1,388
Abstracts 1,376
Indians of North America 1,376
Information services 1,278
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Illustrated books 1,238
International relations 1,226
Italian literature 1,223
Economic aspects 1,220
Early works to 1800 1,204
Best books 1,199
Bibliographical literature 1,195
Geography 1,179
Criticism, interpretation, etc 1,171
Spanish literature 1,151
history 1,148
Library science 1,120