TY  - BOOK
AU  - World Health Organization
TI  - Determination of airborne fibre number concentrations: a recommended methods by phase-contrast optical microscopy (membrane filter method)
SN  - 92-4-154496-1
U1  - 614.71 
PY  - 1997///
CY  - Geneva
PB  - World Health Oraganization
KW  - WHO
KW  - Public health -- Epidemiology
N1  - Gift; WHO, public health, epidemiology, global health
ER  -