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United States
197,814
Dissertations, Academic
138,488
China
65,673
Great Britain
59,199
Education
58,113
Agriculture
56,345
France
56,066
Japan
48,362
World War, 1939-1945
47,531
Women
44,098
Bible
43,902
Germany
37,996
Soviet Union
37,139
Catholic Church
35,856
English language
34,864
India
32,862
World War, 1914-1918
30,430
Art
30,408
Europe
29,904
Jews
28,215
Music
28,053
Law
27,202
Mexico
26,556
Science
26,203
Architecture
25,885
Geology
25,646
Spain
25,055
Italy
23,569
Academic theses
22,145
English
4,875,448
German
823,817
French
669,723
Spanish
620,759
Russian
311,300
Chinese
275,021
Italian
250,355
Japanese
245,384
Portuguese
139,460
Arabic
137,930
Latin
118,347
No linguistic content
78,480
Polish
68,165
Dutch
64,802
Hebrew
59,398
Undetermined
49,310
Swedish
42,874
Indonesian
38,947
Hindi
38,804
Korean
35,023
Czech
34,389
Danish
34,140
Turkish
28,633
Thai
28,303
Urdu
27,358
Hungarian
24,946
Croatian
23,663
Persian
23,442
Norwegian
21,659
Ukrainian
18,084
United States
3,038,609
United Kingdom
731,160
England
682,985
Germany
659,833
France
492,610
Italy
257,125
Japan
247,702
India
225,587
Spain
186,782
China
186,656
Russia (Federation)
182,856
Canada
144,366
Netherlands
105,047
Brazil
96,648
Mexico
94,080
Switzerland
88,557
Argentina
81,591
Soviet Socialist Republic
75,085
Poland
71,500
China (Republic : 1949- )
70,666
Austria
60,850
Russian S.F.S.R.
57,368
Sweden
53,285
Egypt
50,563
Israel
48,957
Indonesia
45,718
Belgium
44,322
Denmark
39,294
Australia
38,692
1980-1989
1,229,203
1990-1999
1,168,131
1970-1979
1,079,203
1960-1969
895,091
2000-2009
832,264
1950-1959
512,271
1900-1909
491,414
1910-1919
417,507
1920-1929
349,434
1940-1949
334,049
1930-1939
330,321
1890-1899
301,958
1880-1889
229,729
1870-1879
176,674
1860-1869
157,328
1990
140,687
1900
138,892
1989
130,824
1850-1859
129,109
1988
127,441
1985
126,873
1980
126,021
1986
124,115
1987
123,857
1984
123,512
1992
123,266
1991
123,237
1983
119,845
1993
117,797
1994
115,454
Book
8,622,645
Serial
484,515
Journal
411,198
Biography
394,796
Conference
287,922
Music
176,548
Musical Score
176,408
Manuscript
165,562
Statistics
137,071
Dictionaries
78,352
Directories
42,799
Microform
40,122
Encyclopedias
13,786
Maps-Atlas
3,622
Map
3,544
Archive
3,384
CDROM
2,045
Mixed Material
1,606
Newspaper
1,193
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
2,988,923
University of California
2,571,155
Harvard University
604,967
University of Virginia
384,778
The University of Texas
379,695
Indiana University
376,049
Cornell University
343,287
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
77,508
University of Alberta
72,226
Michigan State University
58,420
Purdue University
51,987
University of Iowa
49,802
Getty Research Institute
43,084
Keio University 慶應義塾大学
37,739
Rutgers University
28,498
Minnesota Digital Library
21,218