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John Hartman
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Black and white portrait of The Doobie Brothers in 1976, with Jeff Skunk Baxter, John Hartman, Patrick Simmons, Keith Knudsen, Tiran Porter, and Michael McDonald at center.
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John Hartman: Media

American musician
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The Doobie Brothers
Members of the Doobie Brothers at a photo session for their 1978 album Minute...
Michael Ochs Archives/Getty Images