Williams, H. (2002). The restless Northwest: A geological story. Washington State University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilliams, Hill. The Restless Northwest: A Geological Story. Pullman: Washington State University Press, 2002.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWilliams, Hill. The Restless Northwest: A Geological Story. Washington State University Press, 2002.
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