Genre
Maps
117
Statistics
74
Periodicals
60
Technical reports
26
Conference papers and proceedings
16
Databases
14
Bibliographies
10
Handbooks and manuals
10
Annual reports
6
Dictionaries
6
Case studies
5
Drawings
5
Congresses
4
Academic theses
3
Bathymetric maps
3
Catalogs
3
Electronic government information
3
Legislative hearings
3
Serial publications
3
Abstracts
2
Directories
2
Gazetteers
2
Indexes
2
Electronic journals
1
Examinations
1
Geographic information systems
1
History
1
Interactive multimedia
1
Legislative materials
1
Remote-sensing maps
1
Tables (Data)
1
World maps
1