| 000 | 00511nam a22001457a 4500 | ||
|---|---|---|---|
| 008 | 230427b |||||||| |||| 00| 0 eng d | ||
| 020 | _a9241544961 | ||
| 040 |
_aNational Science Library _cNational Science Library |
||
| 080 |
_a504.3.054 _bN7 |
||
| 245 |
_aDetermination of airborne fibre number concentrations: _bA recommended method, by phase-contrast optical microscopy (membrane filter method) _c/ WHO |
||
| 260 |
_aGeneva: _bWHO, _c1997 |
||
| 300 | _aviii, 53p. | ||
| 650 | _aScience | ||
| 942 |
_2udc _cBK |
||
| 999 |
_c24408 _d24408 |
||