"The Mad Planet", Argosy, June 12, 1920 "The Red Dust", Argosy All-Story Weekly, April 2, 1921 "Nightmare Planet", Science Fiction Plus, June 12, 1952 Colonial Survey, Gnome Press, 1957 (also known as The Planet Explorer).
"The Mad Planet", Argosy, 12 iunie 12 1920 "The Red Dust", Argosy All-Story Weekly, 2 aprilie 1921 "Nightmare Planet", Science Fiction Plus, 12 iunie 1952 Colonial Survey, Gnome Press, 1957 (altă denumire The Planet Explorer).