Genre
Maps
50
Periodicals
12
Topographic maps
9
Remote-sensing maps
8
Handbooks and manuals
4
Conference papers and proceedings
3
Environmental impact statements
2
Guidebooks
2
Speeches
2
Technical reports
2
Activity books
1
Bibliographies
1
Biographies
1
Chronologies
1
Encyclopedias
1
Illustrated works
1
Statistics
1