Format
Book
1,221,822
Serial
31,739
Conference Proceeding
27,564
Journal
25,609
Unknown
13,103
Audio
10,929
Musical Score
7,650
Map
6,203
Kit
3,689
Newspaper
3,245
Electronic
2,634
Government Document
2,508
Photo
917
Thesis
731
Book Chapter
671
Manuscript
501
Reference Material
273
Article
41
Physical Object
14