11 Vaglio-Laurin, R. et al., "Supersonic Flow About General Three-Dimensional Blunt Bodies," TR ASD-TR-61-727, Volumes umes I, II, and III, Oct. 1962, General Applied Science Lab., Westbury, N.Y. 12 Thommen, H. U. and D'Attorre, L., "Calculation of Steady, Three-Dimensional Supersonic Flow Fields by a Finite Difference Method," AIAA Paper 65-26, New York, 1965. 13 Chu, C. W., Niemann, A. F., and Powers, S. A., "Calculation of Multiple Rocket Engine Exhaust Plumes by the Method of Characteristics, Part I," AIAA Paper 66-651, Colorado Springs, Colo., 1966. 14 Rakich, J. V., "Three-Dimensional Flow Calculation by the Method of Characteristics," AIAA Journal, Vol. 5, No. 10, Oct. 1967, pp. 1906-1908. 15 Butler, D. S., "The Numerical Solution of Hyperbolic Systems of Partial Differential Equations in Three Independent Variables," Proceedings of the Royal Society, Series A, Vol. 255, 1960, pp. 232-252. 16 Thompson, H. D., Ransom, V. H., and Hoffman, J. D., "An Analytical Study of the Scram jet Exhaust Expansion System," AFAPL-TR-67-142, Pt. I, Nov. 1967, Air Force Aero Propulsion Lab., Wright-Patterson Air Force Base, Ohio. 17 Elliott, L. A., "Shock Fronts in Two-Dimensional Flow," Proceedings of the Royal Society, Series A, Vol. 267, 1962, pp. 558-565. 18 Richardson, D. J., "The Solution of Two-Dimensional Hydrodynamic Equations by the Method of Characteristics," Fundamental Methods in Hydrodynamics, Vol. Ill, Methods in Computational Physics, edited by B. Alder, S. Fernbach, and M. Rotenberg, Academic Press, New York, 1964, pp. 295-318. 19 Heie, H. and Leigh, D. C., "Numerical Stability of Hyperbolic Equations in Three Independent Variables," AIAA Journal, Vol. 3, No. 6, June 1965, pp. 1099-1103. 20 Darwell, H. M. and Trubridge, F. P., "Design of Rocket Nozzles to Reduce Gas Misalignment," Journal of Spacecraft and Rockets, Vol. 6, No. 1, Jan. 1968, pp. 36-41.