Encyclopedias

• Britannica Online is the online version of Encyclopedia Britannica and includes internet links.
• Encyberpedia is an electronic encyclopedia with its own content as well as over 10,000 links to the best reference sites on the Internet.
• Merck Manuals - Encyclopedic medical manuals
• Wikipedia This is an open-content encyclopedia produced by volunteers and is not peer reviewed. Contains more than 7,000,000 articles in several languages.