Genre
Maps
Bibliographies
40
Statistics
30
Databases
29
Topographic maps
24
Bathymetric maps
21
Technical reports
18
Catalogs
16
Atlases
15
Remote-sensing maps
11
Handbooks and manuals
10
Illustrated works
9
Indexes
9
Conference papers and proceedings
8
Census data
7
Case studies
6
Graphs
6
Guidebooks
6
Remote-sensing images
6
Biographies
5
Electronic government information
4
Geographic information systems
4
Outlines and syllabi
4
Software
4
Tourist maps
4
Facsimiles
3
Portraits
3
Vital statistics
3
Aerial photographs
2
Charts, diagrams, etc
2
Chronologies
2
Congresses
2
Geological maps
2
Periodicals
2
Personal correspondence
2
Photographs
2
Reference works
2
Trivia and miscellanea
2
Academic theses
1
Art
1
Census, 1980
1
Children's atlases
1
Classification
1
Computer network resources
1
Diaries
1
Dictionaries
1
Directories
1
Drama
1
Early maps
1
Early works to 1800
1
more ...