Format
Book
435,850
Electronic
19,720
Government Document
17,226
Journal
15,629
Conference Proceeding
15,262
Unknown
10,722
Thesis
8,044
Audio
7,205
Serial
7,045
Manuscript
1,806
Map
1,637
Musical Score
807
Kit
271
Article
242
Reference Material
227
Book Chapter
191
Photo
79
Physical Object
76
Newspaper
15