TY  - GEN
ED  - BRITISH STANDARDS INSTITUTION
TI  - BS 2497 : Pt. 3 : 1972 : Specification for a reference zero for the calibration of pure-tone audiometers : data for a wide-band artificial ear complying with BS 4669
PY  - 1972///
CY  - London
PB  - B.S.I.
ER  -