Format
Book
614,442
Thesis
43,796
Unknown
10,426
Serial
9,558
Journal
8,308
Conference Proceeding
7,680
Map
6,417
Electronic
5,317
Kit
4,449
Audio
3,937
Photo
3,368
Musical Score
2,306
Government Document
2,082
Manuscript
1,552
Book Chapter
947
Newspaper
587
Reference Material
208
Physical Object
172
Article
16