Library, University of Moratuwa, Sri Lanka catalog

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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 - London B.S.I. 1972 - 7p.

Standard Tech. Report. No.: BS 2497 : Pt. 3 : 1972

Universal Decimal Class. No.: 534.771 / : 621.395.623.5

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