Enciclopèdies

Adam Health Illustrated Encyclopedia http://www.nlm.nih.gov/medlineplus/encyclopedia.html
Bartleby.com http://www.bartleby.com/
Columbia Encyclopedia http://www.bartleby.com/65/
Illustrated encyclopedia - drgreene http://www.drgreene.org/body.cfm?id=49&action=CategoryIndex&Category=Complete&title_ab=a
Encarta - MSN http://es.encarta.msn.com/
Enciclonet http://www.enciclonet.com/portada
Enciclopèdia Britannica http://www.britannica.com/
Encyclopædia Universalis en ligne http://www.universalis-edu.com/
Encyclopedia.com http://www.encyclopedia.com/
Encyclopedia of Psychology http://www.psychology.org/
Encyclopédie Canadienne (versions en anglès i francès) http://www.thecanadianencyclopedia.com/index.cfm?TCE_Version=F
Kalipedia - Editorial Santillana http://www.kalipedia.com/
L'Encyclopédie de l'Agora http://agora.qc.ca/dev/2006e.nsf
Medical Encyclopedia - University of Maryland Medicine http://www.umm.edu/esp_ency/index/esp_index.htm
Spice encyclopedia http://www.spiceadvice.com/encyclopedia/index.html
The Herbal Encyclopedia http://www.naturalark.com/herbenc.html
The Merck Manual, Professional Edition http://www.merck.com/mmpe/index.html
Tutoriales Interactivos de Salud - MEDLINEplus http://www.nlm.nih.gov/medlineplus/spanish/tutorial.html