1. On a New Method for the Generation of Sound-Waves
2. Powell, A., and Smith, T.J. "Experiments ConcerningtheHartmannWhistle",Report 64-42,UCLA Dept.ofEngineering,Sep. 1964.
3. Burbank, P.B. and Stallings, R.L. "Heat^Transfer and Pressure Measurements on a Flat-Face Cylinder at a Mach Number Range of 2.49 to 4.44," NASATMX-221,1959.