Eckardt, W. v., & Gottmann, J. (1964). The challenge of Megalopolis: A graphic presentation of the urbanized Northeastern Seaboard of the United States. New York: The Macmillan Company.
Παραπομπή Chicago StyleEckardt, Wolf von, and Jean Gottmann. The Challenge of Megalopolis: A Graphic Presentation of the Urbanized Northeastern Seaboard of the United States. New York: The Macmillan Company, 1964.
Παραπομπή MLAEckardt, Wolf von, and Jean Gottmann. The Challenge of Megalopolis: A Graphic Presentation of the Urbanized Northeastern Seaboard of the United States. New York: The Macmillan Company, 1964.
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