Genre
Maps
186
Bibliographies
15
Databases
3
Atlases
2
Geological maps
2
Programmed instructional materials
2
Statistics
2
Technical reports
2
Thematic maps
2
Case studies
1
Charts, diagrams, etc
1
Dictionaries
1
Geographic information systems
1
Government publications
1
Graphs
1
Periodicals
1
Tables (Data)
1