Churchill, Anthony
Road user charges in central America
The Johns Hopkins University , 1972
 Buku Teks
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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Liss, Sheldon B.
Radical thought in central America
Westview Press, 1991
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