https://www.dailymotion.com/video/x12xm4h_mel-blanc-jack-benny-carson-1974_fun?start=3
My wife and I heard Mel Blanc give a talk at UNC in the early 1980s. He had an ok autobiography which I read once.
He got the tag "Voice Characterizations by Mel Blanc" on the old Loony Tunes cartoons because they would not give him a raise and he asked for being in the credits - and they agreed. He said that single line in the credits paid off better than any raise would have.