Format
Book
1,358,680
Photo
22,945
Unknown
21,357
Journal
20,551
Conference Proceeding
19,145
Thesis
14,385
Electronic
14,131
Kit
12,331
Audio
9,103
Serial
9,003
Manuscript
4,614
Map
3,763
Government Document
3,382
Musical Score
2,735
Physical Object
1,338
Reference Material
552
Book Chapter
535
Newspaper
455
Article
25