000 00288nam a22000977a 4500
999 _c16288
_d16288
245 _aIS 9671:1980-Frequency Weighting for the Measurement of Aircraft Noise (D-Weighting)
260 _aNew Delhi :
_bBureau of Indian Standards (BIS),
_c1980.
300 _a5 p.
650 _aNoise
942 _cST