1. C. L. HOPKINS, S. R. B. SOLLY and A. R. RITCHIE, New Zealand J. Mar. Freshwat. Res.3, 220–229 (1969)
2. J. O. KEITH and E. G. HUNT, Transactions of the Thirty-First North American Wildlife and Natural Resources Conference, Wildlife Management Institute, pp. 150–177 (1966)
3. M. W. ODEMAR, P. W. WILD and K. C. WILSON, California Dept. Fish and Game, MRO Ref. No. 68-12 (1968)
4. R. W. RISEBROUGH, pp. 5–23.IN M. W. Miller and G. G. Berg, (ed.), Chemical Fallout, Charles C. Thomas, Springfield, Illinois (1969)
5. A. M. KADOUM, Bull. Environ. Contam. Toxicol.2, 264–273 (1967)