McKenzie, G. D., & Utgard, R. O. (1975). Man and his physical environment; readings in environmental geology (2nd ed.). Burgess Pub.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMcKenzie, Garry D., और Russell O. Utgard. Man and His Physical Environment; Readings in Environmental Geology. 2nd ed. Minneapolis: Burgess Pub, 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMcKenzie, Garry D., और Russell O. Utgard. Man and His Physical Environment; Readings in Environmental Geology. 2nd ed. Burgess Pub, 1975.
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