Genre
Congresses
129
Handbooks, manuals, etc
65
Legislative hearings
56
Maps
40
Handbooks and manuals
33
Legislative materials
33
Conference papers and proceedings
30
Classification
24
Juvenile literature
17
Early works to 1800
14
History
14
Documentary films
13
Biography
7
Congress
6
Laboratory manuals
6
Periodicals
6
Juvenile works
5
Technical reports
5
Documentary television programs
4
Environmental films
4
Biographies
3
Case studies
3
Educational films
3
Feature films
3
Nonfiction films
3
Observations
3
Textbooks
3
Bibliography
2
Criticism, interpretation, etc
2
Databases
2
Dictionaries
2
Encyclopedias
2
Environmental television programs
2
Field guides
2
Handbook
2
Live-action/animation films
2
Science films
2
Short films
2
Statistics
2
Terminology
2
Activity books
1
Anecdotes
1
Atlases
1
Bibliographies
1
Catalogs
1
Charts, diagrams, etc
1
Coloring books
1
Correspondence
1
Diaries
1
Fiction
1
more ...