ACTION COMICS (1957) #341 (GD/VG)

"Superman Versus Super Clark Kent! - Script by Otto Binder, art by Al Plastino; An atomic explosion seems to split Superman and Clark Kent into separate people, but it's a plot by Professor Vakox to trap Superman in the Phantom Zone. Challengers of the Unknown ad. Brief Batman appearance in Supergirl reprint, "The Four Helpless Heroes!" - Script by Jerry Siegel, art by Jim Mooney; With Superman on a space mission, Supergirl has a day full of emergencies to deal with, but there's a big surprise at the end of it.

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