TY  - BOOK
AU  - Ashrae Standards
TI  - ASHRAE 52.2-2017 : STANDARD 52.2-2017 -- METHOD OF TESTING GENERAL VENTILATION AIR-CLEANING DEVICES FOR REMOVAL EFFICIENCY BY PARTICLE SIZE (ANSI APPROVED)
U1  - 621.3 
PY  - 2019///-09-13
PB  - ASHRAE 
ER  -