Genre
Maps
83
Periodicals
33
Remote-sensing maps
33
Handbooks and manuals
10
Topographic maps
8
Conference papers and proceedings
6
Technical reports
6
Congresses
4
Abstracts
3
Databases
3
Directories
3
Geological maps
3
Bibliographies
2
Physical maps
2
Statistics
2
Anecdotes
1
Atlases
1
Biographies
1
Case studies
1
Census data
1
Festschriften
1
Pictures
1
Posters
1
Quadrangle maps
1
Relief models
1
Serial publications
1