Format
Book
2,017,058
Unknown
117,113
Electronic
37,512
Journal
26,219
Thesis
20,593
Conference Proceeding
16,555
Serial
13,160
Audio
10,015
Government Document
6,384
Book Chapter
3,435
Photo
2,687
Kit
932
Manuscript
924
Musical Score
895
Reference Material
600
Newspaper
515
Map
98
Physical Object
78
Article
6