Ram Dass. Be Here Now. Lama Foundation 1971.
__________ .The Only Dance There is. Anchor Books, New York 1974.
__________ .Crist for the Mill.
Sandweiss, Samuel H. Sai Baba, the Holy Man and the Psychiatrist. Birth Day, San Diego, California 1975.
Stafford, Peter. Psychedelics Encyclopedia. And/Or Press,1977.
Surath, Chakravarti. Samadhi and Beyond. CSA Press, Lakemont, Georgia 1974.
Tart, Charles, Ed. Altered States of Consciousness. John Wiley 1969.
Underhill, Evelyn. Mysticism. Meridan, New York 1955.
Wasson, R. Gordon. Soma, Divine Mushroom of Immortality. Harcourt, Brace, and Janovich, 1967.
Watts, Alan. The Joyous Cosmology. Pantheon, New York 1966.
Wilhelm, Richard. The Secret of the Golden Flower. Harcourt, Brace World, Inc.