Wyly. Geography's Quantitative Revolutions. West Virginia University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWyly. Geography's Quantitative Revolutions. West Virginia University Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWyly. Geography's Quantitative Revolutions. West Virginia University Press.
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