Bucker primarily swiped from Kirby at Marvel, Adams at DC.
The swiping got so bad at DC that the reason DC cancelled "Star Hunters" was because Buckler swiped copyrighted space ship designs from a Saturday morning cartoon show.
It's also worth mentioning that he sued The Comics Journal for publishing examples of his outright plagiarism of a Jack Kirby story, and subsequently withdrew his lawsuit after being devastated in the deposition phase. The CJ lawyers started showing up with stacks of his art and the art he plagiarized from, went through it piece by piece, and he caved.
