Não informado. (1949). Lund studies in geography. University of Lund, Department of Geography.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Lund Studies in Geography. Lund, Suecia: University of Lund, Department of Geography, 1949.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Lund Studies in Geography. University of Lund, Department of Geography, 1949.
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