Avengers #4
"Captain America Joins... The Avengers!"
March 1964
The Avengers find and revive Cap; Namor tricks an alien into attacking the team
reprinted in
*
40 Years of Avengers
2006, in collection
(2006*)
*
Marvel Digital Comics
no date
(no date)
*
Marvel Masterworks: Avengers TPB #1
2009, in collection
(2009*)