Flashback Friday: Vikings 30, Lions 20 (1977)
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Flashback Friday: Raiders 32, Vikings 14 (Superbowl XI)
Las Vegas Raiders - Wikipedia
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AP WAS THERE: Raiders win 1st Super Bowl beating Vikings
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Super Bowl XI, American Football Wiki
1977 Super Bowl delivered long-awaited title to Raiders
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Today in Pro Football History: 1977: Raiders Overcome Colts in OT