When Frank Zappa mocked Led Zeppelin

Did Frank Zappa ever meet Led Zeppelin or was aware of their music? - Quora

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When Frank Zappa mocked Led Zeppelin

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Frank Zappa, Biography, Music & Death

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Frank Zappa: Most Up-to-Date Encyclopedia, News & Reviews

Did Frank Zappa ever meet Led Zeppelin or was aware of their music? - Quora