Não informado. (1949). Lund studies in geography. University of Lund, Department of Geography.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Lund Studies in Geography. Lund, Suecia: University of Lund, Department of Geography, 1949.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Lund Studies in Geography. University of Lund, Department of Geography, 1949.
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