Fraser, B. M.
Algol 17(2):19-23. Spring 1980.
Schweitzer, Darrell
Interzone No. 193: 17-20, 31. Spring 2004.
Addison-Smith, Helen
Colloquy No. 8: [12 p.] May 2004. (https://www.monash.edu/__data/assets/pdf_file/0011/1764821/addison-smith.pdf)
Hassler, Donald M.
in: Staicar, Tom, ed. Critical Encounters II. New York: Ungar, 1982. pp. 60-72.
No authors listed.
Science & Technology 89: 42-51. May 1969.
Anderson, Poul
in: Benford, Gregory, ed. Nebula Awards Showcase 2000. San Diego, CA: Harcourt, 2000. pp. 249-252.
Clement, Hal
in: Clement, Hal. Mission of Gravity. Boston: Gregg, 1978. pp. 242-256. (Reprinted from Astounding, June 1953)
Algol 17(2):22-23. Spring 1980.
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