Well, if you don't know about it, you can't complain about it, can you?Where are the SJWs complaining about minority erasure when it's one of those rare examples where it actually fucking happens?
Mel Blanc only got credited because he managed to get an exclusive contract with WB to do voices for them. I don't know when that part became null and void, but by the 60s he was doing voices in TV animation - Barney Rubble, Mr. Spacely, etc.From what I recall reading Mel Blanc was rarely credited himself until he asked for credit...and was forced to take a pay cut as a result. Then you had the Disney comic books where individual artists were rarely credited.
Of course, the Disney rule back then was that everything had to be credited to Walt. You couldn't sign your own name. People used to call Carl Barks "the Good Duck Artist" because of that. His name didn't come out until the mid-60s. Now, things are different and Disney lets the artists on the comics have credits.