Tucker, William P.
The Mexican government today
University of Minnesota Press, 1958
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Schmidt, Steffen W.
American Government & politics today
Wadsworth, 2009
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Lucy, Richard
The Australian form of government
Macmillan, 1985
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Bennett, Raymond
Australian society and government
M.M & B. Book, 1989
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Crisp, L.F. (Leslie Finlay)
Australian national government
Longman Chesire, 1965
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