Card, Orson S.
in: Card, Orson S. Eye for Eye. New York: Tor, 1990. p. 181-186.
Hull, Elizabeth A.
In: Pederson, Jay P., ed. St. James Guide to Science Fiction Writers. 4th ed. Detroit: St. James, 1996. p. 68-69.
No authors listed.
in: Olendorf, Donna, ed. Something About the Author. Vol. 65. Detroit: Gale Research, 1991. pp.14-15.
in: Lesniak, James G., ed. Contemporary Authors. Detroit: Gale Research, 1992. New Revision Series, Vol. 35, pp.43-44.
Online resource: http://efanzines.com/BPlott/index.htm#letters 33 p. Accessed 7.February.2014
in: Card, Orson S. Eye for Eye. New York: Tor, 1990. p. 99-112.
Perakos, Peter S.
Starlog 23: 26-30. June 1979.
Science Fiction Chronicle 4(5):4. February 1983.
Chronicle 24(11): 33. November 2002. (No. 230)
Bizzell, Patricia
in: Cowart, David, ed. Twentieth-Century American Science-Fiction Writers, Part 1: A-L. Detroit: Gale, 1981. pp. 37-39. (Dictionary of Literary Biography, v. 8)
Barnewald, Gunther
Berlin: Shayol, 2003. 53 p.
Locus 49(4): 74. October 2002.
File 770 No. 142: 20-21. June 2003.
Stephensen-Payne, Phil
Leeds: UK: Galactic Central Publications, 2001. 35pp.
Staicar, Tom
Amazing 28(4): 6-9. January 1982.
Breuer, Siegfried
in: Alien Contact: Jahrbuch fur Science Fiction und Fantasy, 2002. Berlin: Shayol Verlag, 2003. p. 268-271.
Biggle, Lloyd, Jr.
Lan's Lantern No. 8: 21-23. March 1979.
Laudadio, Nicholas C.
Ph. D. Dissertation, State University of New York, Buffalo, 2005. 186 p. (DAI-A 65(12): 4558. June 2005.)
Science Fiction Studies 38(2): 304-320. July 2011.
Davin, Eric L.
Fantasy Commentator 10(3/4): 204-207. Spring 2003. (No. 55/56)
Science Fiction Oral History Association. [Newsletter] p. 1-4. February 2003.
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