Marvel Comics supervillain Thanos made his first appearance in The Invincible Iron Man #55 (February 1973) and was created by writer-artist Jim Starlin
Thanos, Character Close Up
Infinity: The Complete Event, Infinity
Thanos - Collecting Guide and Reading Order – Crushing Krisis
Thanos Reading Order
The Superheroes List: Thanos Rising
Infinity Trilogy Reading Order - ComicBookWire
Thanos, Character Close Up
Thanos Reading Order
Marvel Bronze Age Reading Order Part 2 — Marvel Guides
A comprehensive look at the reading order of Marvel Cosmic, Thanos
Thanos Reading Order (1973 - Present) - The Comic Book Dispatch