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United States
183,439
Dissertations, Academic
136,557
Great Britain
53,833
Education
33,751
Agriculture
33,323
English language
30,775
Women
27,046
India
27,019
Bible
26,322
World War, 1939-1945
20,512
Indians of North America
19,556
Geology
18,613
Canada
18,289
World War, 1914-1918
17,149
Science
15,653
Europe
15,483
China
15,371
African Americans
14,735
Art
14,248
Railroads
14,216
Architecture
13,283
France
12,347
Soviet Union
12,201
Forests and forestry
12,150
Children
12,104
Catholic Church
11,997
English literature
11,967
Academic theses
11,957
Music
11,890
French
64,918
German
47,593
Spanish
24,228
Italian
15,624
Russian
15,439
Chinese
11,256
Latin
10,802
Japanese
9,895
Sanskrit
5,907
Arabic
4,888
Portuguese
4,708
Dutch
4,392
Hebrew
4,226
Greek, Ancient (to 1453)
3,910
Multiple languages
3,350
Hindi
3,154
Thai
2,861
Undetermined
2,814
Greek, Modern (1453- )
2,605
Swedish
2,561
Polish
2,535
Indonesian
1,945
Danish
1,941
Korean
1,925
Czech
1,562
Turkish
1,537
Persian
1,388
Hungarian
1,371
Norwegian
1,297
United States
2,947,388
United Kingdom
702,374
England
657,480
Canada
116,873
India
111,720
Germany
49,557
Netherlands
39,530
Australia
38,089
Scotland
33,778
France
29,441
Switzerland
25,412
Japan
22,258
Italy
20,063
Philippines
19,427
Ireland
15,566
South Africa
13,563
Sweden
12,132
Nigeria
11,028
Pakistan
10,738
China
10,403
New Zealand
8,717
Thailand
8,322
Belgium
8,092
Austria
7,770
Israel
7,368
Denmark
6,759
Singapore
6,380
United States New York
6,225
Malaysia
6,214
1980-1989
656,161
1990-1999
652,519
1970-1979
601,559
1960-1969
456,930
2000-2009
440,886
1950-1959
286,674
1900-1909
260,743
1910-1919
230,583
1940-1949
193,259
1920-1929
186,298
1930-1939
178,297
1890-1899
162,506
1880-1889
114,438
1870-1879
83,687
1900
82,340
1990
78,328
1860-1869
73,823
1989
71,771
1992
70,115
1991
69,212
1980
69,081
1988
68,474
1993
66,996
1850-1859
66,689
1987
66,503
1986
66,119
1985
65,777
1984
64,799
1994
64,784
1978
64,562
Book
4,517,405
Serial
326,750
Journal
270,750
Conference
206,917
Biography
180,395
Manuscript
125,177
Statistics
101,234
Music
47,951
Musical Score
47,870
Dictionaries
34,445
Directories
34,293
Microform
23,682
Encyclopedias
4,117
Maps-Atlas
2,893
Map
2,843
Archive
2,553
CDROM
1,549
Mixed Material
1,503
Newspaper
703
Audio CD
415
Video (DVD)
219
Visual Material
142
Audio
81
Data File
66
Audio LP
46
Video (VHS)
32
University of Michigan
1,544,701
University of California
1,239,571
Harvard University
303,780
Cornell University
269,816
University of Minnesota
234,185
University of Virginia
214,929
Pennsylvania State University
191,071
Indiana University
167,234
New York Public Library
159,053
The Ohio State University
106,910
Library of Congress
95,838
Northwestern University
77,148
University of Alberta
56,923
The University of Texas
54,680
Michigan State University
53,567
Purdue University
50,794
Princeton University
50,637
Columbia University
47,682
University of Chicago
31,936
University of Iowa
29,819
Yale University
17,258
Getty Research Institute
14,891
Rutgers University
14,460
University System of Georgia
13,873
Duke University
12,870