União do Vegetal
- Personal account of a Unaio do Vegetal service from a book about spiritual uses of psychoactives by Nicholas Saunders
- http://www.csp.org/nicholas/vegetal.html

Web of Possibilities
- Contains historical information and other resources on the use of hallucinogens for spiritual awakening and growth. Includes bibliographies on the use of hallucinogens in shamanic religions.
- http://www.well.com/user/dpd/webposse.html

The Peyote Foundation
- Dedicated to the protection and promotion of the peyote cactus and its sacramental use.
- http://www.peyote.net/