| 000 | 00377nam a2200121 4500 | ||
|---|---|---|---|
| 027 |
_aBS 2042 : 1953 : 1953 _q1953 |
||
| 041 | _aeng | ||
| 942 | _cSD | ||
| 110 | _aBritish Standard Institution, London | ||
| 245 | _aBS 2042 : 1953 : 1953 : An artificial ear for calibration of earphones of the external type | ||
| 260 |
_aLondon _bBritish Standard Institution |
||
| 500 | _aSTD591 | ||
| 999 |
_c172638 _d172638 |
||