Ireson, Gren
Reflective reader : secondary science
Learning Matters, 2006
 Buku Teks
Sayre, Wallace S.
American government
Barnes & Noble, 1964
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Posey, Rollin Bennett
American government
Littlefield, Adam, 1958
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American government
by Susan Welch ... [and others]
Thomson, 2006
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Ferguson, John H.
The American system of government
McGraw-Hill, 1947
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