00395nam a22001097a 4500020002200000100004400022245007000066260001400136300001300150306009200163760003000255  a978 92 4 154785 7  dEd: Atkinson James, Yves Chartier et al  aNatural Ventilation for Infection Control in Health-Care Settings  bWHOc2009  a1-106pgs  a1. Ventilation -methods   2. Air microbiology   3. Infection control 4. Guidelines, WHO  bNo. 14 WHO books cupboard