Format
Book
332,677
Audio
11,987
Unknown
11,846
Serial
11,263
Conference Proceeding
8,561
Journal
6,606
Map
4,479
Electronic
4,305
Thesis
3,952
Kit
1,686
Manuscript
1,446
Government Document
1,221
Book Chapter
510
Musical Score
483
Photo
343
Reference Material
249
Newspaper
214
Physical Object
13
Article
6