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Johnson, John A., Claire Wood, and Oregon. Dept. of Fish and Wildlife. Bay Clam Data Series Report:  1996. Newport, Or.: Oregon Dept. of Fish and Wildlife, Marine Region, 1997.

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Johnson, John A., and Oregon. Dept. of Fish and Wildlife. Bay Clam Data Series Report: 1993. Newport, Or.: Oregon Department of Fish and Wildlife, 1994.

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Johnson, John A.. The seasonal occurrence and distribution of fish in the Umpqua Estuary, April 1977 through January 1986 In Information Reports (Oregon. Fish Division). Portland, Or.: Oregon Dept. of Fish and Wildlife, 1986.