Resource publications. 7-12. Investigations in fish control: 3, Minimum lethal levels of toxaphene as piscicide in North Dakota lakes [with list of references], by Dale L. Henegar; 4, Effects of toxaphene on plankton and aquatic invertebrates in North Dakota lakes [with list of references], by Robert G. Needham; 5, Growth rates of yellow perch in 2 North Dakota lakes after population reduction with toxaphene [with list of references], by Donald C. Warnick; 6, Mortality of some species of fish to toxaphene at 3 temperatures [with list of references], by Mahmoud Ahmed Mahdi; 7, Treatment of East Bay, Alger County, Mich, with toxaphene for control of sea lampreys [with list of references], by William E. Gaylord and Bernard R. Smith; 8, Effects of toxaphene on fishes and bottom fauna of Big Kitoi Creek, Afognak Island, Alaska [with list of references], by William R. Meehan and William L. Sheridan.

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