Não informado. (2000). University of Iowa studies in sociology, economics, politics and history. University of Iowa.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. University of Iowa Studies in Sociology, Economics, Politics and History. Iowa City, Iowa: University of Iowa, 2000.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. University of Iowa Studies in Sociology, Economics, Politics and History. University of Iowa, 2000.
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