Marvel Comics © September 1968,  The Avengers #56.  The story is "Death Be Not Proud!". 

Appearing: The Avengers  [Goliath [Hank Pym]; Black Panther; Hawkeye; Wasp; Captain America [Steve  Rogers]]; Bucky [James Buchanan Barnes]; Baron Zemo [Heinrich Zemo]

Works by; Script; Roy  Thomas   Pencils; John Buscema    Inks; George Klein