Climate change and United States Forests
David Lawrence Peterson, James M Vose, Toral Patel-Weynand, editors
Springer, 2014
 Buku Teks
Harlow, Ralph Volney
The United States
Holt, Rinehart and Wiston, 1961
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Harlow, Ralph Volney
The United States
Holt, Rinehart and Wiston, 1961
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United states
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Brown Seyom
The paces of power constancy and change in the United States foreign policy from trumanto/ Reagan Seyom Brown
Columbia University Press , 1983
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