Format
Book
2,841,447
Government Document
805,656
Electronic
201,335
Serial
111,187
Unknown
82,583
Journal
59,071
Audio
45,685
Thesis
40,556
Conference Proceeding
34,920
Kit
30,360
Photo
23,074
Reference Material
19,739
Map
15,533
Musical Score
14,642
Manuscript
9,266
Book Chapter
3,786
Newspaper
2,330
Physical Object
1,008
Article
262