1. 3Gibson, J.S. "The Ultimate Noise Barrier - Far Field Radiated Aerodynamics Noise," International Conference on Noise Control Engineering, Oct.4-6,1972, Washington, B.C., pp.332-333
2. Aircraft Environmental Problems
3. 5Gibson, J.S. "Non-Engine Aerodynamic Noise: The Limit to Aircraft Noise Reduction," Proceedings of the Institute on Noise Control Engineering, Aug.22-24,1973, Copenhagen, Denmark, pp.445-454.