Corydon, Bent
Fort Lee, NJ: Barricade Books, 1992. 459pp.
Dinan, John A.
Echoes (Seymour, TX) 5(3): 25-26. June 1986.
Panshin, Alexei
New York Review of Science Fiction No. 25: 12-17. September 1990.
Crowley, Michael
Slate [5 p.] July 15, 2005. (http://slate.msn.com/)
Manca, Terra
Journal of Religion and Popular Culture 24(1): 80-96. Spring 2012.
No authors listed.
in: Writer: the Shaping of Popular Fiction. Commerce, Calif. : Bridge Publications, 2012. p. 1185-191.
Moskowitz, Sam
in: Moskowitz, Sam. Seekers of Tomorrow. New York: Ballantine, 1967. pp. 155-169.
Stableford, Brian M.
in: Bleiler, E. F., ed. Science Fiction Writers. New York: Scribners, 1982. pp. 179-184.
Robins, W. M.
in: Cowart, David, ed. Twentieth-Century American Science Fiction Writers, Part 1: A-L. Detroit: Gale, 1981. pp. 112-119. (Dictionary of Literary Biography, v. 8)
Schweitzer, Darrell
in: Schweitzer, Darrell, ed. Science Fiction Voices #1. San Bernardino, CA.: Borgo Press, 1979. pp. 53-63. (An earlier version appeared in Squonk, Summer 1979.)
In: Bleiler, Richard, ed. Science Fiction Writers. Second Edition. New York: Scribner’s, 1999. p. 229-235.
Barrett, David V.
Guardian (UK) [2 p.] November 18, 2000. (Cited from the online version)
File 770 No. 137: 11. January 2001.
Science Fiction Chronicle No. 208: 53. October/November 2000.
Barrett, Stephen
Skeptical Inquirer 25(2): 6-7. April 2001.
in: Bleiler, E. F., ed. Supernatural Fiction Writers. New York: Scribner's, 1985. pp.925-932.
Bloom, Harold
in: Bloom, Harold, ed. Modern Fantasy Writers. New York: Chelsea House, 1995. pp.29-42.
Analog 121(4): 9. April 2001.
Pohl, Frederik
in: Pohl, Frederik, ed. The SFWA Grand Masters. Vol. 1. New York: Tor, 1999. p. 265-268.
Thiel, John
Lan's Lantern 24:16-17. November 1987.
Williamson, Jack
Locus 45(6): 69. December 2000.
Turtledove, Harry
Locus 45(6): 69-70. December 2000.
Drake, David
Locus 45(6): 70. December 2000.
Stirling, S. M.
Locus 45(6): 71. December 2000.
Rosenberg, Joel
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