1. EPA, Field Studies Section, unpublished observations (1976).
2. HAYES, W.J., Jr.: Toxicology of Pesticides. Baltimore: Williams and Wilkins 1975.
3. WOLFE, H.R., ARMSTRONG, J.F., STAIFF, D.C., BUTLER, L.C. and DAVIS, J.E., “Control of Hazardous Material Spills,” Proceedings of 1976 National Conference on Control of Hazardous Material Spills, April 25–28, 1976, New Orleans, La., pp. 254–258.