Não informado. (1974). American cartographer. American Congress on Surveying and Mapping.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. American Cartographer. Washington: American Congress on Surveying and Mapping, 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. American Cartographer. American Congress on Surveying and Mapping, 1974.
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