Genre
Periodicals
100
Technical reports
78
Statistics
26
Conference papers and proceedings
19
Handbooks and manuals
13
Interactive multimedia
8
Databases
5
Bibliographies
4
Catalogs
4
Dictionaries
4
Remote-sensing images
4
Illustrated works
3
Academic theses
2
Autobiographies
2
Biographies
2
Chronologies
2
Congresses
2
Encyclopedias
2
Environmental impact statements
2
Maps
2
Photographs
2
Pictures
2
Art criticism
1
Case studies
1
Census data
1
Directories
1
Drawings
1
Exhibition catalogs
1
Posters
1
Remote-sensing maps
1
Video recordings
1