stuck in my head

so i'm watching the rain, reading a thread on louise simonson (while blowing my nose) then it occurs to me... 
 
when did the comic book industry start putting the writers and artist names on the covers...i couldn't remember and could find anything in my search... 
 
now i'm like a dog with a bone that won't let go...my brain says around the early '90s but y'know something  get stuck in my head i can't let go... 
 
so the search continues...