Legionellosis - World Health Organization
Profile of Legionellosis, also called Legionnaires' Disease. Offers a history and overview, how the disease effects people, causes, and prevention.
Legionnaires' Disease - MedlinePlus
Offers links to overviews, organizations, and information from the Medical Encyclopedia for Legionnaires' Disease.
OSHA Technical Manual: Legionnaires' Disease
Provides information on disease recognition, investigation procedures to identify probable water sources, and control strategies.