| 000 | 00433nam a2200121Ia 4500 | ||
|---|---|---|---|
| 008 | 160509s9999 xx 000 0 und d | ||
| 020 | _a92-4-154496-1 | ||
| 100 | _aWorld Health Organization | ||
| 245 | _aDetermination of Airborne Fibre Number Concentrations : A Recommended Method, by phase-contrast Optical Microscopy : 199 | ||
| 260 | _c1997 | ||
| 300 | _a53p. | ||
| 650 | _aAirborne Fibre Number Concentrations :Phase - contrast Op | ||
| 999 |
_c10693 _d10693 |
||