Other
Lee De Forest, American Inventor: The Complete Lee De Forest
An extensive site covering all aspects of Lee de Forest, his inventions, writings, and personal life. Find drawings and pictures of his audion tube and find out about his legacy, especially in the world of electronics.
US National Library of Medicine
Medline Plus: Electromagnetic Fields
This site provides links to a variety of government-sponsored overviews and articles on electromagnetic fields and their associated health risks.