00836cam a2200253 a 4500001000800000005001700008008004100025010001300066015001400079019001100093020001500104035002000119035001200139040002300151043001200174050002500186082001200211110006900223245013800292260006800430300004100498650001900539650002400558184986520180829064907.0721208s1972 enkb 000 0 eng  a72305253 aB72-114521 a473569 a0117505196 9(AuCNLDY)143282 a1849865 aLCbengcLCdNUN:P ae-uk---00aTL725.3.N6bG68 197204a614.7/82 aNoise Advisory Council (Great Britain).bResearch Sub-Committee.10aAircraft noise:bshould the Noise and Number Index be revised?cReport by the Research Sub-Committee of the [Noise Advisory] Council. aLondon,bH.M.S.O. for the Department of the Environment,c1972. a[6], 6 p., fold. leaf;bmap.c25 cm. 0aAirport noise. 0aNoisexMeasurement.