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MacDonald, W.L. (1986). The Architecture of the Roman Empire. Volume II. An Urban Appraisal. Yale Publications in the History of Art 35. New Haven and London: Yale University Press.
MacDonald, W.L. (1982). The Architecture of the Roman Empire. Volume I. An Introductory Study. Yale Publications in the History of Art 17. Second edition. New Haven and London: Yale University Press.