SF Encyclopedia Picture Gallery
A E van Vogt. The Weapon Shops of Isher (New York: Greenberg: Publisher, 1951) [fixup: "The Seesaw" first appeared July 1941 Astounding, "The Weapon Shop" December 1942 Astounding and "The Weapon Shops of Isher" February 1949 Thrilling Wonder Stories: Isher: hb/uncredited]
Image courtesy of Clute Science Fiction Library at Telluride