"The E. Y. Berry Papers; An Unexpected Resource for Students of Recent South Dakota History"
https://www.sdhspress.com/journal/south-dakota-history-3-1/the-e-y-berry-papers-an-unexpected-resource-for-students-of-recent-south-dakota-history
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"The E. Y. Berry Papers; An Unexpected Resource for Students of Recent South Dakota History"
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