@book {269,
	title = {Ayahuasca: Human Consciousness and the Spirits of Nature},
	year = {1999},
	keywords = {ayahuasca, book, hallucinogen, Shamanism, spirituality},
	author = {Ralph Metzner, Ph. D. and J. C. Callaway, Ph. D. and Charles S. Grob, MD and Dennis J. McKenna, Ph. D.}
}
