Format
Book
1,277,836
Thesis
18,462
Conference Proceeding
14,651
Unknown
7,886
Government Document
5,069
Journal
4,385
Electronic
4,291
Kit
3,597
Serial
1,989
Map
1,290
Manuscript
1,040
Audio
918
Book Chapter
902
Newspaper
673
Musical Score
429
Reference Material
368
Photo
212
Article
208
Physical Object
20