S.O.S. FROM THREE WORLDS. New York: Ace Books, Inc., . Small octavo, pictorial wrappers. First edition. Ace Books G647. Three "Med Ship" stories, all featuring Calhoun and Murgatroyd, a small furry sentient creature from one of the Deneb planets that can produce antibodies for any disease: "Plague of Kryder II," "Ribbon in the Sky" and "Quarantine World," all first published in ASTOUNDING SCIENCE FICTION. A fine copy. (#158308).
No statement of printing.