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
 Buku Teks
Harlow, Ralph Volney
The United States
Holt, Rinehart and Wiston, 1961
 Buku Teks
United states
 Buku Teks
Brown, Seyom
The paces of power constancy and change in the United States foreign policy from trumanto to Reagan
Columbia University Press, 1983
 Buku Teks