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020 |q (paperback) 
035 |a (GPO)77016682 
035 |a (MdBJ)955767 
035 |a (NcD)002833031DUK01 
035 |a (OCoLC)03283771 
035 |a 03283771 
035 |a 955767 
035 |a AES5278GD 
037 |b 22161 
040 |a GPO  |b eng  |c GPO  |d MvI 
040 |a GPO  |c GPO 
049 |a JHE1 
074 |a 431-B-5 
086 |a TD 4.509:77-94 
086 0 |a TD 4.509:77-94 
100 1 |a True, Harold C 
245 1 0 |a Noise characteristics of eight helicopters /  |c Harold C. True and E. J. Rickley 
260 |a Washington :  |b Dept. of Transportation, Federal Aviation Administration, Systems Research & Development Service ;  |a Springfield, Va. :  |b for sale by the National Technical Information Service,  |c 1977 
300 |a xiv, 153 p. :  |b ill., graphs, map ;  |c 28 cm 
336 |a text  |b txt  |2 rdacontent 
337 |a unmediated  |b n  |2 rdamedia 
338 |a volume  |b nc  |2 rdacarrier 
490 1 |a Report - Federal Aviation Administration, Systems Research and Development Service ; FAA-RD-77-94 
500 |a Cover title 
500 |a Report date: July 1977 
500 |a "Acoustic data acquired and processed into format by the Noise Measurement and Assessment Laboratory, Transportation Systems Center, Cambridge, Massachusetts." 
504 |a Bibliography : p. 153 
650 0 |a Helicopters  |x Flight testing 
650 0 |a Noise  |x Measurement 
650 0 |a Rotors (Helicopters)  |x Noise  |0 https://id.loc.gov/authorities/subjects/sh00006087 
650 0 |a Rotors (Helicopters)  |x Noise 
710 1 |a United States  |b Federal Aviation Administration.  |b Systems Research and Development Service. 
710 2 |a Transportation Systems Center 
830 0 |a Report (United States. Federal Aviation Administration. Systems Research and Development Service) ;  |v FAA-RD-77-94 
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