Genre
Illustrated works
40
Atlases
19
Photographs
6
Graphs
5
Charts, diagrams, etc
4
Conference papers and proceedings
4
Congresses
4
Periodicals
4
Aerial views
3
Literature
3
Popular works
3
Exhibition catalogs
2
Anatomical atlases
1
Art
1
Biographies
1
Early works to 1800
1
Encyclopedias
1
Handbooks and manuals
1
Identification
1
Interviews
1
Maps
1
Observers' manuals
1
Pre-Linnean works
1
Programmed instructional materials
1
Trivia and miscellanea
1