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1981
Higley, Duane L., and Robert L. Holton. Study of the invertebrates and fishes of salt marshes in two Oregon estuaries In Miscellaneous Report (Coastal Engineering Research Center). Springfield, VA: U.S. Army, Corps of Engineers, Coastal Engineering Research Center, 1981.
Vancouver Washington-Oregon In 1:250,000-scale map of Pacific Coast ecological inventory. Reston, VA: U.S. Fish and Wildlife Service, 1981.