Circulars. 185, 186. Investigations in fish control: 1, Laboratories and methods for screening fish-control chemicals [with list of literature cited, by Robert E. Lennon and Charles R. Walker]; 2, Preliminary observations on toxicity of antlmycin A to fish and other aquatic animals [with list of literature cited, by Charles R. Walker, Robert E. Lennon, and Bernard L. Berger].

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