Doonesbury by Garry Trudeau for February 20, 1973
Transcript:
Rev. Sloan: Mike, it's incredible how many people who come in here are talking about Mark's new radio show... I saw "Marvelous" himself on the street yesterday. He told me he's been enjoying every minute of it... Mike: Really? Rev. Sloan: Well, actually, there is the problem of the ads... Mike: The ads? Mark: ... and soaks up excess skin oil! Tough against blackheads too!