Format
Book
2,712,128
Thesis
86,590
Unknown
70,374
Serial
68,837
Conference Proceeding
57,702
Journal
54,227
Electronic
47,925
Audio
41,814
Musical Score
34,855
Map
28,379
Book Chapter
20,111
Manuscript
14,064
Government Document
11,342
Kit
9,419
Photo
4,793
Newspaper
2,100
Reference Material
2,081
Physical Object
245
Article
91