Format
Book
2,209,705
Thesis
44,165
Electronic
42,909
Conference Proceeding
28,189
Journal
25,226
Serial
18,109
Unknown
12,135
Manuscript
3,575
Audio
3,230
Kit
2,840
Book Chapter
1,247
Government Document
1,152
Map
959
Musical Score
918
Photo
603
Newspaper
476
Reference Material
298
Physical Object
31
Article
12