Genre
- oral histories (literary genre)125
- sound recordings124
- reminiscences123
- interviews120
- periodicals117
- serials (publications)110
- photographs106
- black-and-white photographs94
- publications (documents)83
- newsletters70
- correspondence66
- drawings (visual works)64
- botanical illustrations57
- letters (correspondence)56
- scientific illustrations (images)56
- watercolors (paintings)49
- posters48
- architectural drawings (visual works)35
- pamphlets32
- books14
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