Format
Book
2,900,938
Unknown
96,468
Electronic
37,137
Thesis
23,765
Audio
20,006
Conference Proceeding
19,038
Journal
14,554
Manuscript
12,378
Map
12,300
Serial
11,534
Government Document
9,197
Musical Score
6,427
Newspaper
1,906
Kit
1,246
Physical Object
649
Photo
536
Book Chapter
454
Reference Material
387
Article
208