"Exploring the Black Hills, 1855-1875: Reports of the Government Expeditions: The Scientists' Search for Gold, 1875: Walter P. Jenney and Henry Newton"
https://www.sdhspress.com/journal/south-dakota-history-4-4/exploring-the-black-hills-1855-1875-reports-of-the-government-expeditions-the-scientists-search-for-gold-1875-walter-p-jenney-and-henry-newton
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"Exploring the Black Hills, 1855-1875: Reports of the Government Expeditions: The Scientists' Search for Gold, 1875: Walter P. Jenney and Henry Newton"
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