Action Comics #268: "The Mystery Supergirl!"

Download Action Comics #268

Script: Otto Binder; Jerry Siegel (also claims credit)

Pencils and inks: Jim Mooney

Characters: Suprgirl; Perry White; Superman (flashback and a cameo as Clark Kent); five fake Supergirls

Reprinted:

• in Supergirl Archives (DC, 2001 series) #1
• in Showcase Presents: Supergirl (DC, 2007 series) #1