Justice League of America 20 (Jun 1963) CGC (7.0)

CGC serial # 4201825017

The Mystery of Spaceman X!

Script: Gardner Fox

Pencils: Mike Sekowsky

Inks: Bernard Sachs

Letters: Gaspar Saladino

Characters: Aquaman, The Atom [Ray Palmer]; Batman; The Flash [Barry Allen]; Green Arrow [Oliver Queen]; Green Lantern [Hal Jordan]; Martian Manhunter [John Jones; J'onn J'onzz]; Snapper Carr; Wonder Woman; Superman; Spaceman X (villain)

Synopsis: An alien uses a giant spaceman to absorb disaster-energy to make himself invulnerable, but Superman separates the alien from his power source.