On sale date from the publication date found in the Catalog of Copyright Entries, Third Series, Volume 15, Part 2, Number 1, Periodicals, January-June 1961. Second class permit. Copyright number B904954.
letters submitted by Terry Burke; Manuel Figueros; Thomas Nolan; Richard Gorsky; Mike Smith; Larry Raschi; Gerald Bodlander; Linda Bellen
Serialized story (vs. Lesla Lar) which continues until 285.
Writer identification by Bob Hughes. Story is also claimed by Otto Binder.
Appears between pages 8 and 9 of the Supergirl story.