Format
Book
1,807,010
Electronic
64,141
Unknown
34,723
Government Document
27,195
Thesis
23,419
Conference Proceeding
16,913
Manuscript
11,287
Journal
8,934
Serial
7,816
Map
7,612
Audio
5,598
Musical Score
3,844
Kit
2,158
Book Chapter
1,440
Reference Material
558
Photo
500
Newspaper
412
Article
259
Physical Object
200