1. Product Information—Air filters. Published on behalf of National Safety Associates of America (U.K.), Maidenhead, Berkshire.
2. Air for living;King,1973
3. The effects of high efficiency air filtration systems on night-time asthma attacks;Scherr;W Va Med J,1977
4. Use of laminar control device as adjunct to standard environmental control measures in asthmatic children;Zwemer;Ann Allergy,1973
5. House dust control and asthma: a placebo-controlled trial for cleaning air filtration;Bowler;Ann Allergy,1985