Dennis Burkhart

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The Privileged Planet
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The Privileged Planet

2004

Fire Mountain: The Eruption and Rebirth of Mount St. Helens
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Fire Mountain: The Eruption and Rebirth of Mount St. Helens

1997

The Story of Yosemite National Park
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The Story of Yosemite National Park

1991

Yellowstone an American Legacy
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Yellowstone an American Legacy

2008