Keeper of the Wild: The Life of Ernest Oberholtzer

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The first-ever biography of wilderness preservationist Ernest Oberholtzer, environmental pioneer and explorer and caretaker of Minnesota and Ontario's boundary waters region.

Keeper of the Wild: The Life of Ernest Oberholtzer 2009, Minnesota Historical Society Press

ISBN-13: 9780873517935

Trade paperback

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Keeper of the Wild: The Life of Ernest Oberholtzer 2001, Minnesota Historical Society Press, Saint Paul, MN

ISBN-13: 9780873514095

Hardcover

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