Format
Book
1,254,508
Conference Proceeding
25,681
Serial
23,631
Journal
17,377
Thesis
16,004
Government Document
9,520
Newspaper
8,933
Unknown
8,374
Electronic
5,004
Photo
2,271
Book Chapter
1,552
Kit
1,101
Audio
1,056
Manuscript
849
Map
506
Reference Material
353
Musical Score
287
Physical Object
175
Article
167