1. Swisher, R.D., presentation at 8th Surfactant Congress, Mos-cow, Sept 1976.
2. Leidner, H., R. Gloor and K. Wahrman, Tenside Deterg. 13: 122(1976).
3. “Standard Methods for the Examination of Water and Waste Water,” 14th Edn., American Public Health Assa, Washington, DC, 1975, Method 152B, pp. 603-607.
4. Ibid,, Method 152A, pp. 660-603.
5. Huddleston, R.L., and A.M. Nielsen, Soap Cosmet. Chem. Spec. 55:34(1979).