1. Ho, P. J. “Feasibility Study of the Microwave and the Ultrasonic Techniques on the Continuous Measurement of Solid Propellant Burning Rates,” M.S. Thesis,Purdue Univ., West Lafayette, IN, Aug. 1965.
2. Hale, H. J. “The Demonstration of an Ultrasonic Technique to Measure Solid Propellant Burning Rates Under Actual Combustion Conditions,”M.S. Thesis, Virginia Polytechnic Inst.and State Univ., Blacksburg, VA,June 1967.