Format
Book
869,784
Unknown
36,363
Electronic
33,871
Audio
17,258
Conference Proceeding
16,914
Musical Score
15,271
Journal
9,850
Serial
8,262
Thesis
6,780
Map
4,932
Manuscript
4,808
Government Document
2,775
Kit
660
Book Chapter
522
Physical Object
194
Newspaper
177
Reference Material
169
Photo
148
Article
2