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United States
198,038
Dissertations, Academic
138,488
China
65,701
Great Britain
59,235
Education
58,132
Agriculture
56,394
France
56,088
Japan
48,393
World War, 1939-1945
47,570
Women
44,102
Bible
43,906
Germany
38,012
Soviet Union
37,151
Catholic Church
35,874
English language
34,872
India
32,869
World War, 1914-1918
30,446
Art
30,413
Europe
29,929
Jews
28,218
Music
28,057
Law
27,215
Mexico
26,561
Science
26,222
Architecture
25,889
Geology
25,655
Spain
25,066
Italy
23,578
Academic theses
22,192
English
4,877,717
German
823,947
French
669,875
Spanish
621,046
Russian
311,333
Chinese
275,064
Italian
250,483
Japanese
245,468
Portuguese
139,521
Arabic
137,944
Latin
118,376
No linguistic content
78,481
Polish
68,169
Dutch
64,809
Hebrew
59,408
Undetermined
49,304
Swedish
42,876
Indonesian
39,015
Hindi
38,804
Korean
35,067
Czech
34,399
Danish
34,142
Turkish
28,635
Thai
28,315
Urdu
27,361
Hungarian
24,948
Croatian
23,663
Persian
23,445
Norwegian
21,660
Ukrainian
18,087
United States
3,040,587
United Kingdom
731,285
England
683,104
Germany
659,942
France
492,700
Italy
257,249
Japan
247,790
India
225,617
Spain
186,825
China
186,790
Russia (Federation)
182,922
Canada
144,382
Netherlands
105,063
Brazil
96,674
Mexico
94,096
Switzerland
88,568
Argentina
81,665
Soviet Socialist Republic
75,073
Poland
71,507
China (Republic : 1949- )
70,680
Austria
60,856
Russian S.F.S.R.
57,358
Sweden
53,288
Egypt
50,609
Israel
48,962
Indonesia
45,785
Belgium
44,341
Denmark
39,296
Australia
38,696
1980-1989
1,229,418
1990-1999
1,168,258
1970-1979
1,079,528
1960-1969
895,477
2000-2009
832,418
1950-1959
512,731
1900-1909
491,878
1910-1919
417,562
1920-1929
349,960
1940-1949
334,303
1930-1939
330,529
1890-1899
301,970
1880-1889
229,742
1870-1879
176,675
1860-1869
157,335
1990
140,705
1900
139,277
1989
130,843
1850-1859
129,149
1988
127,456
1985
126,895
1980
126,074
1986
124,130
1987
123,868
1984
123,530
1992
123,279
1991
123,252
1983
119,862
1993
117,816
1994
115,461
Book
8,625,149
Serial
485,366
Journal
411,997
Biography
394,876
Conference
288,016
Music
176,555
Musical Score
176,415
Manuscript
165,594
Statistics
137,205
Dictionaries
78,378
Directories
42,829
Microform
40,153
Encyclopedias
13,786
Maps-Atlas
3,625
Map
3,547
Archive
3,384
CDROM
2,044
Mixed Material
1,606
Newspaper
1,195
Audio CD
959
Visual Material
482
Video (DVD)
376
Audio
140
Audio (music)
110
Data File
75
Audio LP
74
Video (VHS)
33
University of Michigan
2,989,246
University of California
2,572,591
Harvard University
604,966
University of Virginia
385,003
The University of Texas
379,695
Indiana University
376,049
Cornell University
346,313
University of Minnesota
289,937
New York Public Library
259,590
Pennsylvania State University
244,240
The Ohio State University
157,058
Princeton University
135,099
Northwestern University
123,504
Library of Congress
101,736
Columbia University
91,218
University of Chicago
77,513
University of Alberta
72,226
Michigan State University
58,420
Purdue University
51,987
University of Iowa
49,806
Getty Research Institute
43,147
Keio University 慶應義塾大学
37,739
Rutgers University
28,498
Minnesota Digital Library
21,218