McCullagh, P. (1978). Modern concept in geomorphology. Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMcCullagh, Patrick. Modern Concept in Geomorphology. Oxford University Press, 1978.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMcCullagh, Patrick. Modern Concept in Geomorphology. Oxford University Press, 1978.
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