1. D. W. F.Hardie “A History of the Chemical Industry in Widnes ” Imperial Chemical Industries Ltd. 1950 p.155.
2. U.S. Pat.1 607 618(Nov. 23 1926) W. J.HaleandE. C.Britton(toThe Dow Chemical Company).
3. Development of Synthetic Phenol from Benzene Halides1