Sources

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1. A Native American Encyclopedia: History, Cultures, and Peoples, Barry Pritzker

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2. Ancient Landscapes of Western North America: A Geologic History with Paleogeographic Maps, Ronald C. Blakey & Wayne D. Ranney

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3. How the Mountains Grew: A New Geological History of North America, John Dvorak

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4. Roadside Geology of Minnesota, Richard W. Ojakangas

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5. The Encyclopedia of North American Indian Wars, 1607 - 1890: A Political, Social, and Military History, Barry M. Pritzk

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6. The Great Lakes: The Natural History of a Changing Region, Wayne Grady

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7. The Historical Atlas of Native Americans: 150 maps chronicle the fascinating and tragic story of North America's Indigenous Peoples, Dr. Ian Barnes

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8. The Nature of Oaks: The Rich Ecology of Our Most Essential Native Trees, Douglas W. Tailamy

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9. Vanishing Halo: Saving the Boreal Forest, Daniel Gawthrop