The encyclopedia American
Americana Corporation, 1980
 Buku Referensi
The encyclopedia American
Americana Corporation, 1980
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Morris, Richard B.
Encyclopedia of American history
Harper & Row, 1961
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Paneth, Donald
The Encyclopedia of American journalism
Facts on File, 1983
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The blackwell encyclopedia of the American revolution
edited by Jack P. Greene, J.R. Pole
Blackwell , 1994
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