Format
Book
851,517
Conference Proceeding
78,455
Government Document
42,203
Electronic
38,215
Journal
18,422
Thesis
15,395
Unknown
12,014
Serial
9,882
Map
5,309
Manuscript
5,284
Audio
2,777
Musical Score
2,142
Book Chapter
1,148
Kit
739
Physical Object
648
Article
438
Reference Material
400
Photo
291
Newspaper
10