1. Erdey, L. ..Gravimetric Analysis, Pergamon Press, English Edition, 1965, Part II, Pp. 337–68.
2. Welcher, F. J...Organic Analytical Reagents, D. Van Nostrand Co., Inc., New York, 1947,3, 314.
3. Hollingshead, R. G. W...Oxine and Its Derivatives, Butterworths Scientific Publications, London, 1954,1, 280–92;3, 718.
4. Manku, G. S., Bhat, A. N. and Jain, B. D.Anal. Chim. Acta, 1967,39, 128.
5. —————.. Ibid., 1967,39, 369.