By Eckhardt Homer D.   in Noise Control Engineering Journal

ISSN:0736-2501|61|1|50-54

Institute of Noise Control Engineering‎(2013)‎

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By Eckhardt Homer D.   in INTER-NOISE and NOISE-CON Congress and Conference Proceedings

ISSN:0736-2935|1978|1|451-454

Institute of Noise Control Engineering‎(1978)‎

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