Psychedelic Drugs
Council on Spiritual Practices Entheogen Project <http://www.csp.org/practices/entheogens/>
Index of Claude de Contrecoeur's articles <http://www.dog.net.uk/claude/>
Entheogen Links <http://www.entheogen.com/entheolinks.html>
The Lycaeum <http://www.lycaeum.org>
Multidisciplinary Association for Psychedelic Studies (MAPS) <http://www.maps.org/index.html>
The Vaults of Erowid <http://erowid.org>