REFERENCES
- Beverly , R. 1705 . The History and Present State of Virginia London : R. Parker. . Quoted in Schleiffer, H. 1973. Sacred Narcotic Plants of the New World Indians. New York: Hafner Press
- Bristol , M. 1969 . “Tree Datum drugs of the Colombian Sibundoy” . Botanical Museum Leaflets of Harvard University , Vol. 22 : 165 – 222 .
- Casteneda , C. 1969 . The Teachings of Don Juan: A Yaqui Way of Knowledge. New York : Ballantine Books. .
- Cobo , B. 1653 . Historia del Nuevo Mundo Seville : E. Rasco. . Quoted in Schleiffer, H. 1973. Sacred Narcotic Plants of the New World Indians. New York: Hafner Press
- Harner , M. J. 1973 . Hallucinogens and Shamanism. London : Oxford University. .
- Heiser , C. B. 1969 . Nightshades The Paradoxical Plants. San Francisco : W.H. Freeman. .
- Lockwood , T. E. 1973 . A taxonomtc revision of Brugmansia (Solanaceae). , Ph.D dissertation. Cambridge : Harvard University. .
- Schultes , R. E. and Hofmann , A. 1973 . The Botany and Chemistry of Hallucinogens. Springfield , Illinois : Charles C. Thomas. .
- Schultes , R. E. and Smith , E. W. 1976 . A Golden Guide: Hallucinogenic Plants. New York : Golden Press. .