People are only just realizing Miami Dolphins weren't the first
1972 Miami Dolphins season - Wikipedia
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Shula, winningest coach in pro football history, dies at 90
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Don Shula, Legendary Miami Dolphins Coach, Has Died At 90 : NPR
Seventeen and Oh' Review: A Perfect Season for Dolphins - WSJ
Don Shula, longtime Miami Dolphins coach and two-time Super Bowl
Perfect '72 Dolphins, still 'competing,' hope 'scary' Eagles lose
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1972 Miami Dolphins' 50-year anniversary: Five interesting facts