TY  - BOOK
TI  - Determination of airborne fibre number concentrations: a recommended method, by phase-constrast optical microscopy (membrane filter method)
SN  - 9241544961
PY  - 1997///
CY  - Geneva
PB  - World Health Organization
KW  - Air pollutants, Occupational
KW  - analysis
KW  - Environmental monitoring
KW  - Methods
KW  - Microscopy, Phase
KW  - contrast
ER  -