Here is a copy of Captain America #135-March 1971
It is in used condition.
See pics for condition.
1st Appearance " "MONSTER APE" (Doctor Erik Gorbo)
Captain America introduces the Falcon to S.H.I.E.L.D and the new acquaintances arrange an exhibition sparring match in the combat room. When a scientist feels belittled and that only physical attributes matter, he turns himself into a more powerful being using the blood of an ape to become the Raging MONSTER APE and sets his sights on defeating Cap and Falcon!