Genre
Conference papers and proceedings
40
Congresses
28
Periodicals
22
Legislative hearings
12
Video recordings
8
Legislative materials
7
Technical reports
7
Annual reports
6
Bibliographies
6
Educational films
6
Handbooks and manuals
6
Internet videos
6
Maps
4
Case studies
3
Geographic information systems
3
Guidebooks
2
Tours
2
Academic theses
1
Aerial views
1
Coloring books
1
Databases
1
Dictionaries
1
Directories
1
Environmental impact statements
1
Fiction
1
Illustrated works
1
Indexes
1
Literature
1
Longitudinal studies
1
Surveys
1
Treaties
1