1. Hilton, D. A., et al., “Sonic Boom Exposures During FAA Community-Response Studies Over a 6-month Period in the Oklahoma City Area” (NASA Technical Note NT D-2539, 1964).
2. Courant, R., and Friedrichs, K. O., Supersonic Flow and Shock Waves (Interscience, New York, 1948).
3. Friedlander, F. G., Proc. Roy. Soc., A, 186, 322 (1946).
4. Zepler, E. E., and Harel, J. R. P., J. Sound Vib., 2, 249 (1965).