1. J. M. A. Van Der Horst,Proc. Amer. Electroplaters Soc. 31 (1943) 56.
2. R. Pyles ibid. 31 (1943) 136.
3. R. J. Good,Surf. Colloid Sci. 11 (1979) 86.
4. R. N. Wenzel,Ind. Eng. Chem. 28 (1938) 988.
5. W. A. Zisman, in ?Advances in Chemistry?, No. 43, edited by R. F. Gould (American Chemical SocietyWashington, 1964) p. 1.