Calkins, F. C. (1905). Geology and water resources of a portion of east-central Washington. U.S. Geological Survey.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCalkins, Frank C. Geology and Water Resources of a Portion of East-central Washington. Washington, D.C.: U.S. Geological Survey, 1905.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCalkins, Frank C. Geology and Water Resources of a Portion of East-central Washington. U.S. Geological Survey, 1905.
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