Genre
Databases
319
Statistics
202
Academic theses
192
Maps
167
Census data
79
Periodicals
77
Video recordings
65
Interactive multimedia
52
Dictionaries
45
Handbooks and manuals
40
Conference papers and proceedings
28
Congresses
20
Catalogs
19
Bathymetric maps
16
Bibliographies
15
Software
14
Atlases
12
Census, 2000
11
Illustrated works
11
Case studies
10
Remote-sensing images
9
Longitudinal studies
8
Indexes
7
Observations
7
Photographs
7
Technical reports
7
Topographic maps
7
CD-ROMs
6
Nonfiction films
6
Sound recordings
6
Vital statistics
6
Remote-sensing maps
5
Statistics, Medical
5
Directories
4
Graphs
3
Instructional films
3
Pictures
3
Tables (Data)
3
Blank forms
2
Cross-cultural studies
2
Educational films
2
Geological maps
2
Motion pictures
2
Video recordings for the hearing impaired
2
Abstracts
1
Aerial photographs
1
Animated films
1
Cases
1
Census
1
Children's sound recordings
1
more ...