![Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon [Paperback] Dolnick, Edward](https://cdn.shopify.com/s/files/1/1137/1156/products/61mzBQcgeYL._SL1000.jpg?v=1744299485)
Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon [Paperback] Dolnick, Edward
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