TY - RPRT TI - NBS hearing aid test procedures, chapter III. Performance measurement data from the National Bureau of Standards AU - Burnett, E D AU - Bassin, M A PY - 1976 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS IR 75-919 DO - 10.6028/NBS.IR.75-919 ER -