Genre
Conference papers and proceedings
133
Bibliographies
126
Periodicals
110
Maps
92
Congresses
83
Technical reports
71
Abstracts
56
Handbooks and manuals
55
Statistics
38
Nomenclature
19
Classification
18
Catalogs
15
Guidebooks
15
Databases
14
Surveys
13
Directories
12
Tables (Data)
12
Illustrated works
11
Indexes
11
Identification
10
Dictionaries
9
Government publications
9
Literature
9
Serial publications
9
Topographic maps
8
Graphs
7
Observations
7
Geographic information systems
6
Geological maps
5
Popular works
5
Academic theses
4
Festschriften
4
Remote-sensing maps
4
Bathymetric maps
3
Biographies
3
Case studies
3
Gazetteers
3
Observers' manuals
3
Photographs
3
Photographs from space
3
Remote-sensing images
3
Video recordings
3
Atlases
2
Catalogs and collections
2
Cross-cultural studies
2
Diaries
2
Laboratory manuals
2
Nomenclature (Popular)
2
Pictures
2
Posters
2
more ...