| 000 | 00398nam a2200121Ia 4500 | ||
|---|---|---|---|
| 100 | _aWorld Health Organization | ||
| 020 | _a92-4-154496-1 | ||
| 942 | _cBK | ||
| 245 | _aDetermination of airborne fibre number concentrations : a recommended method, by phase - contrast optical microscopy (membrane filter method) | ||
| 260 |
_aauth., Geneva _c1997 |
||
| 082 | _a614.71 WHO | ||
| 300 | _aviii,53p figs. | ||
| 999 |
_c35817 _d35817 |
||