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by Fish, G.R. (Ministry of Agriculture and Fisheries, Fisheries Research Division. Wellington).
by Livingston, Robert J.
by Berryman, A. A. (Alan Andrew).
by Burns, N.M;
by Sagar, P;
by Neilson, Keri;
-- Waikato (N.Z.)Environment Waikato
by -- United StatesEnvironmental Protection Agency. Office of Water Regulations and Standards. -- International Symposium on Inland Waters and Lake Restoration (1980 : Portland, Me.).