Technical papers. 18-22. 18, Fish sampling and estimation of relative abundance in Lewis and Clark Lake [with list of references]; by Charles H. Walburg; 19, Use of echosounder in measuring distribution of reservoir fishes [with list of references]; by James W. Mullan and Richard L. Applegate; 20, Some effects of silt turbidtiy on behavior of juvenile large-mouth bass and green sunfish [with list of references]; by Norman W. Heunstra, David K. Damkot, and Norman G. Benson; 21, Biological characteristics of sauger population in Lewis and Clark Lake [with list of references]; by William R. Nelson; 22, Biology of white crappie in Lewis and Clark Lake [with list of references]; by Richard E. Siefert.

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