1. Burke, J., and Holswade, W., U.S. Department of Health, Education, and Welfare, PDA, Pesticide Analytical Manual Vol. I chlorinated 2.32(E) 12-1-65.
2. Burke, J., and Giuffrida, L., ibid 7-1-65.
3. Gudzinowicz, B., The Analysis of Pesticides, Herbicides and Related Compounds. Jarrell-Ash Co., 97 June, 1965.
4. Westlake, W. E., et. al. This Bulletin, Vol. I, 29 (1966)