Genre
Electronic books
28
Early works to 1800
10
Travelogues (Television programs)
10
Periodicals
8
Documentary films
5
Congresses
4
Charters
2
Exhibitions
2
Sources
2
Biography
1
Broadsides
1
Case studies
1
Documentary television programs
1
Electronic journals
1
Electronic reference sources
1
Essays
1
Exhibition catalogs
1
Interviews
1
Juvenile literature
1
Libros electronicos
1
Statistics
1
Translations into English
1