1. American Society for Testing Materials, 1974 Annual Book of Standards, Part 31, Designations D 466-22 and D 820-22, Philadelphia 1974.
2. B. M. Milwidsky and S. Holtzman, Soap Chem. Spec.42, 83 (1966).
3. V. W. Reid, G. F. Longman, and E. Heinerth, Tenside4, 292 (1967).
4. M. Bares, Tenside6, 312 (1969).
5. M. J. Rosen and H. A. Goldsmith, Systematic Analysis of Surface Active Agents, 2nd Ed., New York: Wiley. 1972.