Format
Book
472,931
Conference Proceeding
11,016
Unknown
7,160
Photo
5,807
Electronic
5,140
Journal
5,089
Thesis
4,957
Serial
4,884
Map
4,541
Audio
3,937
Kit
2,979
Manuscript
2,394
Musical Score
1,674
Government Document
1,105
Book Chapter
861
Newspaper
346
Reference Material
143
Physical Object
67
Article
14