American Heart Association - http://www.americanheart.org Center for Disease Control - http://www.cdc.gov Council for Accreditation in Occupational Hearing Conservation - http:// www.caohc.org Dept. of Transportation - http://www.dot.gov Environmental Protection Agency - http://www.epa.gov Firefighter Close Calls - http://www.firefighterclosecalls.com Firehouse.com - http://www.firehouse.com Illinois Emergency Management - http://www.state.il.us/iema/ Mine Safety and Health Administration - http://www.msha.gov National Clearinghouse on Drugs and Alcohol - http://www.health.org National Fire Protection Agency - http://www.nfpa.org Occupational Safety and Health Administration - http://www.osha.gov RescueDirect - http://http://www.rescuedirect.com