Genre
Periodicals
33
Maps
26
Technical reports
20
Handbooks and manuals
14
Conference papers and proceedings
11
Serial publications
8
Congresses
6
Statistics
5
Bathymetric maps
3
Catalogs
2
Databases
2
Topographic maps
2
Abstracts
1
Atlases
1
Bibliographies
1
Charts, diagrams, etc
1
Dictionaries
1
Geological maps
1
Graphs
1
Interviews
1
Novels
1
Photogrammetric maps
1
Quadrangle maps
1
Remote-sensing maps
1
Tourist maps
1
World maps
1