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2. On sound generated aerodynamically II. Turbulence as a source of sound;Lighthill;Proceedings of the Royal Society,1954
3. The generation of sound by turbulent jets;Ribner;Advances in Applied Mechanics,1964
4. Effect of jet temperature on jet noise generation;Rollin;NACA TN,1958
5. Experimental studies of noise from subsonic jets in still air;Lassiter;NACA TN,1952