www.hse.gov.uk/legionnaires
www.bgs.ac.uk/boreholes/home.html
www.environment-agency.gov.uk/subjects/waterres/?lang=_e
www.defra.gov.uk/ENVIRONMENT/water/conserve/index.htm
www.hse.gov.uk/legionnaires
http://standards.mackido.com/bs/bs-standards24_view_5411.html
www.est.org.uk
www.thecarbontrust.co.uk
www.nef.org.uk
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