Marvel Feature #12
"The Bite of the Blood Brothers!"
November 1973
The Thing and Iron Man battle the Blood Brothers at Thanos' former base
reprinted in
*
Essential Marvel Two-In-One TPB #1
2005, in collection
(2005*)
*
Marvel Digital Comics
no date
(no date)
*
Marvel Masterworks: Marvel Two-In-One TPB #1
2013, in collection
(2013*)