Scott, Andrew M.
Political thought in America
Holt, Rinehart & Winston, 1959
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Evolutionary thought in America
edited by Stow Persons
Yale University Press, 1950
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Booth, John A.
Understanding central America
Westerview Press, 1989
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Booth, John A.
Understanding central America
Westerview Press, 1993
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Rodriguez, Mario
Central America / Mario Rodriguez
Prentice-Hall, 1965
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