The Comics History of All 9 CAPTAIN MARVELS - Nerdist
Marvel Super-Heroes #12,18 (1967-68 Marvel) 2 Books – Raw 0.5 to 4.5 – 1st Appearances of Captain Marvel (Mar-Vell) and the Guardians of the Galaxy. on Goldin Auctions
The Comics History of All 9 CAPTAIN MARVELS - Nerdist
The Marvel Comics Guide: THE COMING OF CAPTAIN MARVEL (1967-1968)