Dharmawardhana, R.W.
Sheethakarana/waayusamana paddhathi aluthwediyaa kireeme parisara mithuru thaakshanayan saha wikalpa sheethakaraka - Colombo 06 Author 2011 - 99p. : ill., tables
Text in Sinhala
AIR CONDITIONING
VENTILATION
OZONE PROTECTIVE ATMOSPHERES
ENVIRONMENTAL IMPACT
697.9 / D5
Sheethakarana/waayusamana paddhathi aluthwediyaa kireeme parisara mithuru thaakshanayan saha wikalpa sheethakaraka - Colombo 06 Author 2011 - 99p. : ill., tables
Text in Sinhala
AIR CONDITIONING
VENTILATION
OZONE PROTECTIVE ATMOSPHERES
ENVIRONMENTAL IMPACT
697.9 / D5