Genre
Maps
136
Periodicals
66
Bibliographies
57
Conference papers and proceedings
56
Abstracts
47
Academic theses
26
Databases
24
Technical reports
22
Statistics
14
Nomenclature
13
Congresses
12
Indexes
12
Surveys
10
Catalogs
9
Topographic maps
9
Geological maps
8
Government publications
8
Bathymetric maps
7
Handbooks and manuals
7
Directories
6
Geographic information systems
5
Guidebooks
5
Case studies
4
Graphs
4
Illustrated works
4
Remote-sensing maps
4
Photographs
3
Pictures
3
Serial publications
3
Tables (Data)
3
Classification
2
Diaries
2
Dictionaries
2
Geological cross-sections
2
Literature
2
Observations
2
Quadrangle maps
2
Software
2
Atlases
1
Biographies
1
Catalogs and collections
1
Charts, diagrams, etc
1
Domestic fiction
1
Environmental impact statements
1
Festschriften
1
Gazetteers
1
Internet videos
1
Novels
1
Online resources
1
Personal correspondence
1
more ...