Check out this vintage 60s ad for Frank Zappa and the Mother's We're Only In It For The Money. "From the same wonderful, wholesome and American teen rock combo that is responsible for Freak Out! and Absolutely Free e e e ee e" It was found in marvel
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Frank Zappa Marvel Comics Ad, 1968 - Charles Johnson - The Lizard Annex - True/Slant:
"And here’s an interesting bit of 60s trivia; in a few issues of some of the Marvel comics, we’ve discovered the following advertisement for Frank Zappa’s Mothers of Invention and their new album, “We’re Only In It For the Money.” I’d totally forgotten about this ad."