World's Finest Comics #260

1. The Four Billion Superman of Earth (Superman and Batman / written by Denny O'Neil, edited by Julius Schwartz)

2. Tight Squeeze for a Tiny Titan (The Atom / written by Bob Rozkis, edited by Julius Schwartz)

3. Lure of the Magnetic Menace (Black Lightning, with a flashback cameo by Hal Jordan / written by Denny O'Neil)

4. There Goes the Neighborhood (Captain Marvel / written by E. Nelson Bridwell) 

Note:  The Black Lightning story is printed from a canceled series from the DC Implosion.