Inficon
http://www.inficonindustrialleakdetectors.com
Air Products and Chemicals, Inc.
http://www.airproducts.com/helium/default.htm
Air Conditioning and Refrigeration Institute
http://www.ari.org
AHR Expo
http://www.ahrexpo.com
Appliance Magazine
http://www.appliancemagazine.com