Wolf, D. E. (1996). Big dams and other dreams: The Six Companies story. University of Oklahoma Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWolf, Donald E. Big Dams and Other Dreams: The Six Companies Story. Norman: University of Oklahoma Press, 1996.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWolf, Donald E. Big Dams and Other Dreams: The Six Companies Story. University of Oklahoma Press, 1996.
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