Marking, L. L., King, E. L., Walker, C. R., and Howell, J. H., 1970, Toxicity of 33NCS (3'-chloro-3' nitrosalicylanilide) to freshwater fish and sea lampreys: La Crosse, Wisconsin, U.S. Bureau of Sport Fisheries and Wildlife, Investigations in Fish Control 38, 16 p. Abstract Keywords