Genre
Documentary films
28
Juvenile literature
7
Documentary television programs
6
History
6
Legislative hearings
6
Short films
5
Television news programs
4
Maps
3
Educational films
2
Juvenile works
2
Legislative materials
2
Nonfiction films
2
Atlases
1
Experimental films
1
Feature films
1
Fiction
1
Mechanical works
1
Nature films
1
Photographs
1
Photographs from space
1
Remote-sensing maps
1
Science films
1
Spatiocartes
1
Specimens
1
Treaties
1