Captain America (1968 1st Series) #355

"Missing Persons" Part 1 of 3. Guest-starring Sersi. Story by Mark Gruenwald. Art by Rich Buckler and Al Milgrom. Cover by Ron Frenz and Al Milgrom.

Bernie Rosenthal makes a desperate phone call for help to Steve Rogers! Teenagers including Bernie's sister are mysteriously disappearing. After undergoing a transmutation from Sersi, Captain America goes under cover as a teenager to investigate! Also in this issue, Battlestar teams up with the Falcon to battle Coachwhip, Puff Adder, and Rock Python. 

32 pages Cover price $0.75.