1. D. G. CROSBY and T. E. ARCHER, Bull. Environ. Contam. and Toxicol.1, 16 (1966).
2. R. P. MARQUARDT and E. N. LUCE, Anal. Chem.,23, 1484 (1951).
3. J. E. COAKLEY, J. E. CAMPBELL, and E. F. MCFARREN, J. Agr. Food Chem.,12, 262 (1964).
4. H. P. BURCHFIELD and E. E. STORRS, Abstracts 140th National Meeting, American Chemical Society, September, 1961, p. 19A.
5. R. P. MARQUARDT, H. P. BURCHFIELD, E. E. STORRS and A. BEVENUE. In “Analytical Methods for Pesticides, Plant Growth Regulators, and Food Additives,” G. Zweig, Ed., Academic Press, New York, 1964. Vol. IV, p. 95.