"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 Out of This World, Avalon, 1958.
"Solar Constant", Astounding, iulie 1956, altă denumire "Critical Difference" "Sand Doom", Astounding, decembrie 1955 "Combat Team", Astounding, martie 1956, altă denumire "Exploration Team" "The Swamp Was Upside Down", Astounding, septembrie 1956 Out of This World, Avalon, 1958.