Format
Book
1,162,563
Government Document
230,083
Serial
88,586
Unknown
72,520
Electronic
55,729
Journal
51,991
Audio
30,133
Conference Proceeding
24,961
Photo
21,550
Kit
18,808
Map
15,172
Musical Score
10,302
Reference Material
9,875
Thesis
8,424
Manuscript
6,356
Newspaper
2,199
Book Chapter
1,417
Physical Object
843
Article
167