Lowenthal, D., & Riel, M. (1972). Structures of environmental associations. New York: American Geographical Society.
Παραπομπή Chicago StyleLowenthal, David, and Marquita Riel. Structures of Environmental Associations. New York: American Geographical Society, 1972.
Παραπομπή MLALowenthal, David, and Marquita Riel. Structures of Environmental Associations. New York: American Geographical Society, 1972.
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