1. American Society for Testing Materials, “A.S.T.M. Standards 1955, Part 6,” pp. 1096–1099.
2. Armour Chemical Division. Armour and Company, “Alpha-Sulfoalkyl Acids,” Technical Bulletin G-7 R 1 (March 20, 1957).
3. Barnett, G., and Powers, D. H., Proc. Sci. Sect. Toilet Goods Assoc., No.24, 24–28 (1955).
4. Becher, P., and Compa, R. E., J. Am. Oil Chemists’ Soc.,34, 53–57 (1957).
5. Bistline, R. G. Jr., Stirton, A. J., Weil, J. K., and Maurer, E. W., J. Am. Oil Chemists’ Soc.34, 516–518 (1957).