Format
Book
1,451,642
Government Document
79,308
Electronic
69,156
Serial
44,933
Conference Proceeding
31,370
Journal
31,279
Unknown
21,496
Thesis
16,727
Manuscript
7,084
Map
5,568
Audio
5,009
Musical Score
2,553
Reference Material
1,248
Article
777
Kit
540
Photo
295
Newspaper
236
Physical Object
175
Book Chapter
152