Longwell, C. R. (1941). Outlines of physical geology. New York,London: J. Wiley & sons, inc.,Chapman & Hall, limited.
शिकागो स्टाइल उद्धरणLongwell, Chester R. Outlines of Physical Geology. New York,London: J. Wiley & sons, inc.,Chapman & Hall, limited, 1941.
एमएलए उद्धरणLongwell, Chester R. Outlines of Physical Geology. New York,London: J. Wiley & sons, inc.,Chapman & Hall, limited, 1941.
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