TY  - GEN
TI  - Determination of airborne fibre number concentrations : a recommended method, by phase-contrast optical microscopy (membrane filter method)
SN  - 92-4-154496-1
PY  - 1997///
CY  - Geneva : 
PB  - World Health Organization
KW  - Air pollutants, Occupational
KW  - Analysis
KW  - Environmental monitoring
KW  - Methods
KW  - Microscopy, Phase-contrast
ER  -