Format
Article
1,863,645 results
Book
1,264,474 results
Review
693,541 results
Dictionary entry/article
82,272 results
Archived Material
67,045 results
Series/Journal
44,194 results
Journal
37,444 results
Microfilm
12,150 results
Literary Remains
4,687 results
Musical Score
3,808 results
Map
3,273 results
Microfiche
2,208 results
Audio
1,736 results
CD
1,335 results
Newspaper
1,238 results
Photo
1,022 results
Video
963 results
Statistics
728 results
Kit
693 results
Database
576 results
DVD
399 results
Unknown
379 results
VHS
325 results
Cassette
313 results
Website
308 results
Data Medium
168 results
Weblog
111 results
Manuscript
96 results
Slide
52 results
Research Data
40 results
Braille
15 results
Software
5 results
Physical object
1 results