Genre
Maps
15
Statistics
9
Technical reports
9
Legislative hearings
7
Periodicals
5
Bibliographies
4
Serial publications
4
Legislative materials
3
Rules and practice
3
Conference papers and proceedings
2
Congresses
2
Guidebooks
2
Handbooks and manuals
2
Registers (Lists)
2
Case studies
1
Databases
1
Directories
1
Environmental impact statements
1