| 000 | 00372nam a2200121 4500 | ||
|---|---|---|---|
| 027 |
_aBS 2091 : 1969 _q1969 |
||
| 041 | _aeng | ||
| 942 | _cSD | ||
| 110 | _aBritish Standard Institution, London | ||
| 245 | _aBS 2091 : 1969 : Specification for respirators for protection against harmful dusts and gases | ||
| 260 |
_aLondon _bBritish Standard Institution |
||
| 500 | _aSTD612 | ||
| 999 |
_c172664 _d172664 |
||