Genre
- historical maps111
- maps (documents)111
- books9
- photographs9
- relief maps8
- video recordings (physical artifacts)7
- field notes6
- journals (accounts)6
- documentary film4
- drawings (visual works)4
- land surveys4
- pencil drawings4
- printed ephemera4
- serials (publications)4
- sketchbooks4
- surveys (documents)4
- newsletters3
- periodicals3
- publications (documents)3
- black-and-white photographs2
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