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1958
Brown, Robert D. Jr., and Howard D. Gower. "Twin River Formation (Redefinition), Northern Olympic Peninsula, Washington." Bulletin of the American Association of Petroleum Geologists 42, no. 10 (1958): 2492-2512.
Brown, Robert D. Jr., and Howard D. Gower. "Twin River Formation (Redefinition), Northern Olympic Peninsula, Washington." Bulletin of the American Association of Petroleum Geologists 42, no. 10 (1958): 2492-2512.
Brown, Robert D. Jr., and Howard D. Gower. "Twin River Formation (Redefinition), Northern Olympic Peninsula, Washington." Bulletin of the American Association of Petroleum Geologists 42, no. 10 (1958): 2492-2512.