Format
Book
3,055,698
Government Document
245,349
Electronic
153,983
Serial
146,088
Journal
84,746
Conference Proceeding
74,014
Thesis
40,802
Unknown
30,222
Audio
4,027
Kit
2,117
Reference Material
2,005
Manuscript
1,767
Book Chapter
1,723
Newspaper
956
Photo
812
Musical Score
338
Map
285
Article
69
Physical Object
50