Move over Superman. I got this!!
Supergirl's Greatest Victory! ACTION COMICS Vol.1, No.262, March 1960; Cover Art: Curt Swan, Stan Kaye, Ira Schnapp; Writer: Robert Bernstein; Penciler: Wayne Boring; Inker: Stan Kaye Witnessing the landing of a Kryptonite meteor, Supergirl muses about the substance’s dangerous effects, and is determined to develop a Kryptonite immunity through gradual exposure to more and more [...]