National Air Duct Cleaners Association
http://www.nadca.com

American Society of Heating, Refrigerating and Air Conditioning Engineers
http://www.ashrae.org

New York City Department of Health & Mental Hygiene Bureau of Environmental & Occupational Disease Epidemiology "Guidelines on Assessment and Remediation of Fungi in Indoor Environments"
http://www.nyc.gov/html/doh/html/epi/moldrpt1.html

Environmental Protection Agency
http://www.epa.gov

Occupational Safety and Health Administration
http://www.osha.gov

American Conference of Governmental Industrial Hygienists
http://www.acgih.org/home.htm