Trask, P. (1932). Origin and environment of source sediments of petroleum. Gulf Publishing.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रTrask, Parker. Origin and Environment of Source Sediments of Petroleum. Houston: Gulf Publishing, 1932.
एमएलए (9वां संस्करण) प्रशस्ति पत्रTrask, Parker. Origin and Environment of Source Sediments of Petroleum. Gulf Publishing, 1932.
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