1. Lead in the Canadian Environment (Publication No. BY 73-7 (ES)) ch. 2 (National Research Council, Canada, 1973).
2. Labarre, N., Milne, J. B., and Oliver, B. G., J. Water Res., 7, 1215–1218 (1973).
3. Wood, J. M., Science, 183, 1049–1052 (1974).
4. Lead. Airborne lead in perspective, 18 (Natn. Acad. Sci. Washington, D.C., 1972).
5. Shapiro, H., and Frey, F. W., The Organic Compounds of Lead, 288 (Interscience, New York, 1968).