MacDougall, Duncan, M.D. 1907. Soul Substance. American Medicine
Vol. #8, (April), http://www.artbell.com/duncan.html. Submitted by W.E. Fair, and transcribed by Marie Juba and Karen Day. Page last updated Feb. 19, 1999.Muldoon, Sylvan. 1936. The case for astral projection.
Chicago: The Aries Press.Muldoon, Sylvan J., and Hereward Carrington. 1968. The projection of the astral body.
London: Rider.Powell, Arthur Edward. 1927. The astral body.
Wheaton, Ill.: Theosophical Publishing House.Powell, Arthur Edward. 1927. The etheric double.
Wheaton, Ill.: Theosophical Publishing House.Rampa, T. Lobsang. 1966. You forever.
New York: Pageant Press.Smith, Suzy. 1965. The enigma of out-of-body travel.
New York: Signet.Smith, Suzy. 1968. Out-of-body experiences for the millions.
Los Angeles: Sherboume Press.YRAM (Marcel Louis Forhan). 1972. Practical astral projection.
New York: Samuel Weiser. World Wide Web ReferencesRobert Bruce's Home Pages (The Astral Pulse) —
http://www.tower.net.au/~rsb/
http://www.geocites.com/Athens/Troy/9959/
Dr. Duncan MacDougal's Home Page —
http://www.artbell.com/duncan.html
Twin Shaman Home Page —
http://www.newgaia.com/tshaman