1. SPRAGUE J.B. and CARSON W.V. 1963 Chemical conditions in the Northwest Miramichi River from 1960 to 1962. Fish. Res. Bd. Canada, Biol. Sta., St. Andrews, Circular, General Series No. 38, 4 pp.
2. Lethal concentrations of copper and zinc for young Atlantic salmon;SPRAGUE;J. Fish. Res. Bd. Canada,1964
3. FRY F.E.J. 1947 Effects of the environment on animal activity. Univ. Toronto Stud., Biol. Ser. No. 55; Pub. Ontario Fish. Res. Lab. No. 68, 62 pp.
4. SPRAGUE J.B., and RAMSAY B. A. Lethal levels of mixed copper-zinc solutions for juvenile salmon. J. Fish Res. Bd. Canada. (in press)
5. The toxicity of mixtures of zinc and copper sulphates to rainbow trout (Salmo gairdnerii Richardson);LLOYD;Ann. Appl. Biol.,1961