IF - Worlds of Science Fiction: June 1957 (Volume 7, Number 4)
Illustrations by Virgil Finlay, Ed Emshwiller, Paul Orban. Cover by Mel Hunter ("Kodachrome from Files of First Mars Expedition.")

Science: "The Face of Mars" by Dr. Robert S. Richardson

Novelettes: "Pretty Quadroon" by Charles L. Fontenay
"Jingle in the Jungle" by Aldo Giunta
"On the Dotted Line" by Lloyd Biggle, Jr.

Stories: "Operation Gold Brick" by Walter S. Tevis, Jr.
"Does a Bee Care?" by Isaac Asimov
"Shuffle Board" by Dan Galouye
"The Human Element" by Leo P. Kelley

Edited and published by James L. Quinn (who edited from November 1952 to August 1958.) Asssitant editor is Eve Wulff; Art Editor is Mel Hunter.