eBook 532,798 Government Document 351,251 Book 328,761 Microform 37,864 Serial 17,748 Database 8,330 Video 7,997 Journal 7,402 Conference Proceeding 4,690 DVD 3,153 Thesis 2,197 Audio 1,928 Map 1,810 CD 1,746 VHS 1,241 Musical Score 990 Software 883 Blu-ray Disc 440 Photo 425 Newspaper 310 Manuscript 170 Cassette 118 Book Chapter 116 Kit 92 Reference Material 83 Electronic 52 Physical Object 30 Slide 7 Unknown 5 Braille 1 Sensor Image 1