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White perch occurrence, spread, and hybridization in the middle Illinois River, Upper Mississippi River System

Irons, K. S., O'Hara, T. M. , McClelland, M. A., and Pegg, M. A., 2002, White perch occurrence, spread, and hybridization in the middle Illinois River, Upper Mississippi River System: Transactions of the Illinois Academy of Science, v. 95, p. 207–214.

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