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
AV  - TD883.1 .D474 1997
U1  - 628.5/3 21
PY  - 1997///
CY  - Geneva
PB  - World Health Organization
KW  - Air
KW  - Pollution
KW  - Environmental monitoring
KW  - Industrial hygiene
N1  - Includes bibliographical references (p. 42-43)
ER  -