Sub-Mariner (1968 1st Series) #35
Published Mar 1971 by Marvel.
In this prelude to 1st Defenders story, "Confrontation!," Part 2 of 2 - Namor, the Hulk and the Silver Surfer team up to battle the Avengers in a storyline that hints that the three will be teaming up again. Story by Roy Thomas with Sal Buscema art and inks by Jim Mooney. Cover price $0.15.