TY  - BOOK
ED  - World Health Organization
TI  - Determination of airborne fibre number concentrations : : a recommended method, by phase-contrast optical microscopy (‎membrane filter method)‎
SN  - 9241544961
PY  - 1997///
CY  - Geneva
PB  - WHO
KW  - Air Pollutants, Occupational
KW  - analysis
KW  - Environmental Monitoring
KW  - Microscopy, Phase-Contrast
KW  - methods
UR  - https://apps.who.int/iris/bitstream/handle/10665/41904/9241544961.pdf?sequence=1&isAllowed=y
ER  -