1. ALLEN,J.F., et al., Organic Synthesis,vol.3,pp 394,New York, John Wiley & Sons,1967
2. CRUICKSHANK,P.A., and JARROW,H.C., J.Agr.Food.Chem.,21,333,(1973)
3. FAO/WHO: 1967 Evaluations, of Some Pesticide Residues in Food, pp.179,Rome,1968
4. GRAHAM,S.L., and HANSEN,W.H., Bull.Environ.Contam.Toxicol.,7,19, (1972)
5. HYLIN, J.W., ibid.,10, 227,(1973)