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Centre County, PA : the county in which we live
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Centre County, Pennsylvania : exerpts from historical writings
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Firefly world factbook
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Centre County Factbook : A Look At Physical, Social and Economic Characteristics
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Canada
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Pennsylvania landscapes; a geography of the Commonwealth
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The American Civil War : a military history
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The mighty Mississippi : the life and times of America's greatest river
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Wicked river : the Mississippi when it last ran wild
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Wicked river the Mississippi when it last ran wild
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Pacific silicon chips and surfboards, coral reefs and atom bombs, brutal dictators, fading empires, and the coming collision of the world's superpowers
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Earning the Rockies : how geography shapes America's role in the world
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All about the Great Lakes
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My incredible India
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Pacific : silicon chips and surfboards, coral reefs and atom bombs, brutal dictators, fading empires, and the coming collision of the world's superpowers
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Virginia
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Measuring America : how the United States was shaped by the greatest land sale in history
