Genre
Legislative materials
787
Legislative hearings
763
Documentary films
344
History
284
Congresses
266
Conference papers and proceedings
183
Nonfiction films
182
Case studies
162
Documentary television programs
114
Handbooks, manuals, etc
102
Environmental impact statements
85
Environmental films
81
Rules and practice
77
Feature films
69
Handbooks and manuals
56
Television news programs
55
Environmental television programs
43
Short films
43
Biography
35
Nonfiction television programs
28
Educational films
27
Statistics
25
Technical reports
24
Biographies
23
Interviews
20
Juvenile literature
19
Congress
18
Bibliography
16
Observations
14
Audiobooks
13
Juvenile works
12
Maps
11
Tours
11
Trials, litigation, etc
11
Cases
10
Educational television programs
10
Periodicals
10
Criticism, interpretation, etc
9
Fiction
9
Bibliographies
8
Electronic books
8
Video recordings for the hearing impaired
8
Exhibition catalogs
7
Instructional films
7
Military history
7
Nature films
7
Television programs
7
Designs and plans
6
Exhibitions
6
Instructional television programs
6
more ...