Format
Book
1,811,036
Unknown
59,601
Conference Proceeding
48,725
Serial
44,225
Journal
40,282
Audio
21,575
Thesis
17,128
Map
13,600
Government Document
11,086
Electronic
9,153
Musical Score
5,712
Kit
5,128
Book Chapter
4,950
Newspaper
4,440
Manuscript
2,165
Reference Material
796
Photo
781
Article
47
Physical Object
33