Format
Book
38,560,931
Government Document
1,784,794
Electronic
1,691,674
Serial
1,375,258
Thesis
1,344,393
Audio
1,094,717
Unknown
811,808
Journal
743,416
Musical Score
732,521
Conference Proceeding
724,370
Map
568,297
Manuscript
288,316
Kit
238,457
Book Chapter
204,921
Photo
174,458
Newspaper
62,474
Reference Material
51,562
Physical Object
9,294
Article
1,972