Genre
Databases
Maps
15
Academic theses
5
Bibliographies
3
Conference papers and proceedings
3
Handbooks and manuals
3
Catalogs
2
Statistics
2
Technical reports
2
Census data
1
Census, 2010
1
Congresses
1
Data dictionaries
1
Directories
1
Geographic information systems
1
Graphs
1
Indexes
1
Observations
1
Periodicals
1
Topographic maps
1