Jack Abel was an American comic book artist best known as an inker for leading publishers DC Comics and Marvel Comics. He was DC's primary inker on the Superman titles in the late 1960s and early 1970s, and inked penciler Herb Trimpe's introduction of the popular superhero Wolverine in The Incredible Hulk #181. He sometimes used the pseudonym Gary Michaels.
Ross Andru was an American comics artist and editor. He is best known for his work on The Amazing Spider-Man, Wonder Woman, The Flash, and The Metal Men, and for having co-created The Punisher. During Andru's long career he also worked on Sgt. Rock, the Suicide Squad features in the Brave and the Bold, Rip Hunter, Time Master and Sea Devils at DC. At Marvel Andru contributed to Marvel Feature (where he drew the 1st appearance of The Defenders) and Marvel Team-Up among others.