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Zappa Gear on Twitter: "Frank Zappa's floor pedals used in the Roxy shows: a Boomerang wah-wah and a Mu-tron III envelope follower https://t.co/X26XJiDMb9" / Twitter
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Stompbox: 100 Pedals of the World's Greatest Guitarists. [Limited Signed & Numbered First Edition] – Stompbox Book
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Zappa Gear: The Unique Guitars, Amplifiers, Effects Units, Keyboards and Studio Equipment: Ekers, Mick, Zappa, Dweezil: 9781540012029: Amazon.com: Books
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