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• The Doobie Brothers - Wikipedia

• The Doobie Brothers - Members, Ages, Trivia | Famous Birthdays

• Doobie Brothers Try To Keep Long Train Running, 50 Years On

• How The Doobie Brothers Survived 50 Years And Got Their Due

• Band - Doobie Brothers - Official Site

• Doobie Brothers - Official Site

• Doobie Brothers Celebrate New Album, 50th Anniversary Tour And ...

• The Doobie Brothers Biography, Songs, & Albums | AllMusic

• The Doobie Brothers, Still Going Strong - YouTube

• The Doobie Brothers | Rock & Roll Hall Of Fame

• The Doobie Brothers: "These Are The Better Days" - CBS News

• How Many The Doobie Brothers Are Original? - Quora