Sub-Mariner (1968 1st Series) #34 VF+
Published Feb 1971 by Marvel.
Cover by Sal Buscema. "Titans Three!" part one of two, script by Roy Thomas, pencils by Sal Buscema, inks by Jim Mooney; Sub-Mariner, Silver Surfer and the Hulk help the citizens of a small Central American country overthrow El General; Prelude (with #35) to 1st Defenders story. 36 pgs., full color. $0.15. Cover price $0.15.