Genre
Statistics
33
Conference papers and proceedings
21
Congresses
16
Handbooks and manuals
16
Technical reports
14
Treaties
12
Guidebooks
8
Maps
6
Case studies
4
Directories
4
Environmental impact statements
2
Periodicals
2
Biographies
1
Calendars
1
Databases
1
Dictionaries
1
Identification
1
Interviews
1
Legislative hearings
1
Observers' manuals
1
Tables (Data)
1