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Mullen, Robert E.. Fishes of the Salmon River estuary, Oregon In Information Report Series. Fisheries . Vol. no. 79-5., 1978.
→ digital.osl.state.or.us/islandora/object/osl%3A18340
Mullen, Robert E.. Salmon River project In Federal Aid Progress Reports. Fisheries. Portland, Or., 1979.
→ ir.library.oregonstate.edu/concern/technical_reports/736665263
Mullen, Robert E.. Salmon River project In Federal aid progress reports. Fisheries. Portland, Or., 1978.
→ ir.library.oregonstate.edu/concern/technical_reports/8049g5966
Mullen, Robert E.. Salmon River project In Federal aid progress reports : Fisheries, Edited by Alan M. McGie. Anadromous fish research in Oregon's coastal watersheds. Portland, Or., 1977.