Genre
Electronic books
696
Periodicals
62
Congresses
51
Case studies
46
Exhibitions
24
Libros electronicos
20
Biography
19
Statistics
16
Electronic book
14
Nonfiction films
14
Early works to 1800
13
Newsreels
9
Pictorial works
9
Documentary films
8
Handbooks, manuals, etc
8
Maps
8
Encyclopedias
7
Sources
7
Bibliography
6
Electronic journals
6
Directories
5
Filmed interviews
5
Instructional films
5
Juvenile literature
5
Documentary television programs
4
Filmed lectures
4
Guidebooks
4
Nonfiction television programs
4
Poetry
4
Resolutions
4
Classification
3
DVD-Video discs
3
Songs and music
3
Broadsides
2
Census, 1930
2
Educational films
2
Feature films
2
Historical reenactments (Television programs)
2
Historical television programs
2
Literary collections
2
Popular works
2
Videocassettes
2
Archives
1
Cases
1
Catalogs
1
Census, 1940
1
Charts, diagrams, etc
1
Chronology
1
Commercial treaties
1
Cross-cultural studies
1
more ...