Ferguson, John H.
The American federal government
McGraw-Hill, 1981
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Ferguson, John H.
The American federal goverment
McGraw-Hill, 1961
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Patrick, John
History of the American Nation
Macmillan Publishing Company, 1984
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Todd, Lewis Paul
Rise of the American nation
Harcourt, Brace & World, 1961
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Todd, Lewis Paul
Rise of the American nation
Harcourt Brace Jovannovich, 1972
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