Adventure Comics #300 CGC 3.0
Aventure Comics #300 CGC 3.0
The Super-Planet of Clark Kent and Lana Lang!
The Face Behind the Lead Mask! (first appearance of Urthlo and Mon-el joins up with the Legion)
Contains a house ad for Superman Annual #5
Written by: Henry Boltinoff, Jerry Siegel , and Mort Weisinger
Art by: Henry Boltinoff, John Forte, George Papp, and Al Plastino
Cover by: Curt Swan