Genre
- photographs129
- periodicals127
- newsletters110
- black-and-white photographs93
- serials (publications)80
- publications (documents)68
- drawings (visual works)59
- botanical illustrations52
- scientific illustrations (images)52
- watercolors (paintings)48
- color photographs35
- architectural drawings (visual works)33
- pamphlets32
- correspondence30
- letters (correspondence)29
- color slides24
- slides (photographs)24
- posters22
- sound recordings16
- oral histories (literary genre)15
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