1. .Provisional reference coupler for the calibration of earphones used in audiometry .IEC Publication, 1970a ;303
2. .An IEC artificial ear of the wide-band type for the calibration of earphones used in audiometry .IEC Publication, 1970b ;318
3. .Standard reference zero for the calibration of pure-tone audiometers .ISO Recommendation, 1964 ;R389 ,Also Addendum 1(1970)