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2. D.J. Maglieri, T.L. Parrot, D.A. Hilton, W.L. Copeland, Lateral-Spread Sonic-Boom Ground-Pressure Measurements from Airplanes at Altitudes to 75,000 Feet and Mach Numbers to 2.0, NASA-TN-D-2021,1963, URL https://ntrs.nasa.gov/citations/19640000542.
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4. Spikes on sonic-boom pressure waveforms;Pierce;J. Acoust. Soc. Am.,1968
5. Measurements of the refraction and diffraction of a short N wave by a gas-filled soap bubble;Davy;J. Acoust. Soc. Am.,1971