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(1975) Iowa Fisheries Research Technical Series No. 75-1 Variations in the abundance of channel catfish year classes in the upper Mississippi River and causative factors Don R. Helms, Fishery Research Biologist Fisheries Section Jerry M. Conley, Superintendent of Fisheries December, 1975. Natural Resources, Department of
(2006) Does Health Information Matter for Modifying Consumption?, October 2006. Iowa State University