1. T. J. Mix, J. S. Sweck, and M. Weinberg, Chem. Eng. Prog.,74, No. 4, 49?55 (1978).
2. M. R. Cannon, Oil Gas J., 51, No. 12, 268?270 (1952).
3. M. R. Cannon, Oil Gas J.,55, No. 38, 68?70 (1956).
4. M. R. Cannon, Ind. Eng. Chem.,53, No. 8, 629?630 (1961).
5. J. R. McWhirter and M. R. Cannon, Ind. Eng. Chem.,53, No. 8, 632?634 (1961).