Download Action Comics #301
Script: Leo Dorfman
Pencils: Jim Mooney
Inks: Jim Mooney
- Characters: Supergirl, Superman, Fortress of Solitude, Comet the Super-Horse, Prince Endor of Zerox (flashback), Lord Nomed of Zerox (villain), Chimera, Cerberus, Griffin; Lena Thorul.
- in Adventure Comics (DC, 1938 series) #390 (March 1970).
- in Showcase Presents: Supergirl (DC, 2007 series) #2.