More about R. H. Spencer:
| | Books by R. H. Spencer: Books in the extended shelves: Spencer, R. H.: Assessment of urban rail noise climates and abatement options (Dept. of Transportation, Transportation Systems Center] ;, 1976), also by S. L. Wolfe, Boeing Vertol Company, and Transportation Systems Center (page images at HathiTrust) Spencer, R. H.: Impact of prediction accuracy on costs-noise technology applications in helicopter (The Office ;, 1981), also by H. Sternfeld, Boeing Vertol Company, and United States. Federal Aviation Administration. Office of Environment and Energy (page images at HathiTrust) Spencer, R. H.: Study of cost/benefit tradeoffs available in helicopter noise technology applications (Dept. of Transportation, Federal Aviation Administration ;, 1980), also by Harry Sternfield, Boeing Vertol Company, and United States Federal Aviation Administration (page images at HathiTrust)
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