1. R. M. C. Dowson, D. C. Elliott, W. H. Elliott and K. M. Jones, “Data for Biochemical Research,” 2nd ed, Oxford University Press, London, 1964, pp. 532.
2. F. Feigl, “Spot Test in Organic Analysis,” 6th ed, Elsevier Publishing Co., Amsterdam, 1960, pp. 176.