Kirk, R. (1975). Exploring Crater Lake country. University of Washington Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKirk, Ruth. Exploring Crater Lake Country. Seattle: University of Washington Press, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKirk, Ruth. Exploring Crater Lake Country. University of Washington Press, 1975.
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