1. J. Sherma, “Pesticides and Plant Growth Regulators,” Vol. VII ed. by G. Zweig, Academic Press, 1973.
2. CIPACCIPAC Handlook Vol. I Analysis of technical and formulated pesticides, 856 (1970).
3. D.J.Finney, “Probit Analysis,” 3rd Ed., Cambridge Univ. Press, 1971, p. 318.