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1964
Bromery, R. W., Parke Jr. D. Snavely, and U.S. Geological Survey. Geologic interpretation of reconnaissance gravity and aeromagnetic surveys in northwestern Oregon In Geological Survey Bulletin. Vol. no.1181-N. Geological Survey no.1181-N. Washington, D.C.: United States Government Printing Office, 1964.
Snavely, Parke Jr. D., Holly C. Wagner, and U.S. Geological Survey. Geologic sketch of Northwestern Oregon In Geological Survey Bulletin. Vol. no.1181-M. Geological Survey no.1181-M. Washington, D.C.: United States Government Printing Office, 1964.