"The Ethical Equations", Astounding, June 1945 "Keyhole", Thrilling Wonder, December 1951 "Doomsday Deferred", The Saturday Evening Post, September 24, 1949 "First Contact", Astounding, May 1945 "Nobody Saw the Ship", Future, May–June 1950 "Pipeline to Pluto", Astounding, August 1945 "The Lonely Planet", Thrilling Wonder, December 1949 "De Profundis", Thrilling Wonder, Winter 1945 "The Power", Astounding, September 1945 "The Castaway", Argosy, September 1946 "The Strange Case of John Kingman", Astounding, May 1948 "Proxima Centauri", Astounding, March 1935 "The Fourth-Dimensional Demonstrator", Astounding, December 1935 "Sam, This Is You", Galaxy, May 1955 "Sidewise in Time", Astounding, June 1934 "Scrimshaw", Astounding, September 1955 "Symbiosis", Collier's, June 14, 1947 "Cure for Ylith", Startling Stories, November 1949 "Plague on Kryder II", Analog, December 1964 "Exploration Team", Astounding, March 1956 (also known as "Combat Team") "The Great Catastrophe", first publication "To All Fat Policemen", first publication Med Ship, edited by Eric Flint and Guy Gordon, Baen, June 2002. "Med Ship Man", Galaxy, October 1963 "Plague on Kryder II", Analog, December 1964 "The Mutant Weapon", Astounding, August 1957 as "Med Service" "Ribbon in the Sky", Astounding, June 1957 "Tallien Three", Analog, August 1963 as "The Hate Disease" "Quarantine World", Analog, November 1966 "The Grandfathers' War", Astounding, October 1957 "Pariah Planet", Amazing, July 1961 (also known as This World is Taboo) Planets of Adventure, edited by Eric Flint and Guy Gordon, Baen, October 2003. The Forgotten Planet "The Mad Planet", Argosy, June 12, 1920 "The Red Dust", Argosy, April 2, 1921 "Nightmare Planet", Argosy, June 12, 1952 The Planet Explorer (also known as Colonial Survey) "Solar Constant", Astounding, July 1956 as "Critical Difference" "Sand Doom", Astounding, December 1955 "Combat Team", Astounding, March 1956 as "Exploration Team" "The Swamp Was Upside Down", Astounding, September 1956 "Anthopological Note", Fantasy and Science Fiction, April 1957 "Scrimshaw", Astounding, September 1955 "Assignment on Pasik", Thrilling Wonder, February 1949 "Regulations", Thrilling Wonder, August 1948 "The Skit-Tree Planet", Thrilling Wonder, April 1947 as "Skit-Tree Planet" A Logic Named Joe, edited by Eric Flint and Guy Gordon, Baen, June 2005. "A Logic Named Joe" (as Will F. Jenkins), Astounding, March 1946 "Dear Charles", Fantastic, May 1953 Gateway to Elsewhere, Ace, 1954; first appeared as "Journey to Barkut" in Startling, January 1952. The Duplicators, Ace, 1964; first appeared as "Lord of the Uffts" in Worlds of Tomorrow, February 1964. "The Fourth-Dimensional Demonstrator", Astounding, December 1935 The Pirates of Zan, Ace, 1959; first serialized as The Pirates of Ersatz in