1. Hanson, D.B. : Study of Soisc Sources in a Subsonic Fan Using Rfcasurcd Blade Pressures and Acoustic Theory. Forthcoming NASA Contractor Report (NASA Contract No. SAS1-12505).
2. Ilanson, Donald B. : Spectrum of Rotor Soisc Caused by Atmospheric Turbulence. J. Acoust. Soc. Am., YOI. 5G, no. 1, July 197-191.