Mahood, H.R.
Pressure groups in American politics
Scribner, 1967
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Huntington, Samuel P.
American politics
The Belknap Press, 1981
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Boerner, Hermann
Representations of groups, with special consideration for the needs of modern physics
North-Holland, 1970
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Simpson, David
The politics of American English, 1776-1850i
Oxford University Press , 1986
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The politics of American government
Stephen J. Wayne [et all.]
Thomson, 2005
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