Genre
Conference papers and proceedings
39
Periodicals
31
Legislative hearings
18
Legislative materials
18
Bibliographies
12
Congresses
11
Technical reports
10
Handbooks and manuals
7
Maps
5
Atlases
3
Case studies
3
Statistics
3
Databases
2
Dictionaries
2
Graphs
2
Academic theses
1
Activity books
1
Directories
1
Environmental impact statements
1
Essays
1
Festschriften
1
Guidebooks
1
Observations
1
Pictures
1
Posters
1
Serial publications
1
Statutes and codes
1
Treaties
1
Video recordings
1