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by Knudson, Duane V., Ph.D.
by Knudson, Duane V.
by Knudson, Duane V
by Hoffman, Shirl J.; Knudson, Duane V., Ph.D.
by Knudson, Duane
by Knudson. Duane V.; Brusseau, Timothy A.
by Duane Knudson
by Hoffman, Shirl; Knudson, Duane