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1971
United States. Army Corps of Engineers. National Shoreline Study. Inventory Report Columbia-North Pacific Region. Washington and Oregon. Portland, OR: United States, Department of Defense, Department of the Army, Corps of Engineers, North Pacific Division, 1971.
→ www.govinfo.gov/content/pkg/CZIC-gb458-8-u56-1971/pdf/CZIC-gb458-8-u56-1971.pdf