Which head coach led the Pittsburgh Steelers to victory in Super Bowl IX?

Which team did the Pittsburgh Steelers defeat in Super Bowl IX? Who was named MVP of Super Bowl IX? Franco Harris was named MVP of which Super Bowl? In which city was Super Bowl IX played? In what year was Super Bowl IX played? Which team did the Pittsburgh Steelers defeat in Super Bowl X? Lynn Swann was named MVP of which Super Bowl? In which city was Super Bowl X played?