Format
Book
1,225,855
Serial
31,783
Conference Proceeding
27,656
Journal
25,670
Unknown
13,243
Audio
10,959
Musical Score
7,731
Map
6,207
Kit
3,690
Newspaper
3,245
Electronic
2,634
Government Document
2,521
Photo
920
Thesis
737
Book Chapter
673
Manuscript
502
Reference Material
274
Article
41
Physical Object
14