www.apea.org.uk
The Association of Petroleum and Explosives Administration

www.peimf.com
Petroleum Equipment Installers & Maintainance Federation

www.pei.org
Petroleum Equipment Institute

www.tuv.com
The Technical Inspection Association

www.bsi-global.com
The British Standards Institution

www.forecourt-uk.com
The Forecourt Retail Database

www.petroretail.net
Petrol Retail Net

www.petrolworld.com
Petrol World

www.fhwa.dot.gov
US Department of Transport