Washington Geological Survey (1911-1921, Landes, H., Thyng, W. S., Roberts, M., Shedd, S., Arnold, R., & Ruddy, C. A. (1902). Annual report for ... Gwin Hicks.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington Geological Survey (1911-1921, Henry Landes, W. S. Thyng, Milnor Roberts, Solon Shedd, Ralph Arnold, और C. A. Ruddy. Annual Report for ... Olympia, Wash.: Gwin Hicks, 1902.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington Geological Survey (1911-1921, et al. Annual Report for ... Gwin Hicks, 1902.
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