https://findingaids.library.columbia.edu/archives/cul-13599387
Henry Krumb papers, 1909-1953 - Columbia University Archives
columbia universityhenrypapersarchives
https://open.library.ubc.ca/collections/specialp/items/1.0229446
Wold outcrop. Krumb & Conway samples (Conways underlined). Map obtained from The Granby Co. No M...
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https://ratking.itch.io/pitman-krumb
Pitman Krumb by Rat King
pitmanratking