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U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. The National MapArchived 2012-03-29 at the Wayback Machine, accessed December 27, 2017
Brown, Larry R.; Moyle, Peter B. (July 1, 1991). Status of Coho Salmon in California(PDF) (Report). National Marine Fisheries Service. Archived(PDF) from the original on December 28, 2017. Retrieved December 27, 2017.