Adventure Comics (1938 1st Series) #354 VG
Published Mar 1967 by DC.
Cover pencils by Curt Swan, inks by George Klein. The Adult Legion!--Tales of the Legion of Super-Heroes, script by Jim Shooter, pencils by Jim Shooter (layouts only) and Curt Swan, inks by George Klein; Superman is summoned to help the adult Legion investigate acts of sabotage; The Legion discovers the saboteur is Ferro Lad's twin brother, but he has been under the mind control of the Legion of Super-Villains. Lightning Lad and Light Lass article. 36 Pages, Full Color. Cover price $0.12.