Genre
Legislative hearings
465
Legislative materials
364
Documentary films
191
Congresses
113
History
81
Conference papers and proceedings
78
Television news programs
77
Documentary television programs
65
Nonfiction films
64
Short films
58
Case studies
48
Environmental films
41
Educational films
40
Periodicals
29
Feature films
26
Science television programs
21
Fiction
20
Interviews
18
Rules and practice
14
Educational television programs
13
Nonfiction television programs
13
Juvenile literature
12
Observations
12
Technical reports
10
Wildlife television programs
10
Congress
9
Juvenile works
9
Science fiction
8
Sources
8
Biography
7
Instructional television programs
7
Maps
7
Popular works
7
Biographies
6
Drama
6
Environmental television programs
6
Forecasts
6
Juvenile fiction
6
Novels
6
Poetry
6
Bibliography
5
Electronic books
5
Ethnographic films
5
Film clips
5
Nature television programs
5
Video recordings for the hearing impaired
5
Audiobooks
4
Encyclopedias
4
Panel discussions
4
Science films
4
more ...