September 30, 1981: Twins close Metropolitan Stadium with a loss – Society for American Baseball Research
Harmon Killebrew, Baseball Wiki
On this date in Twins history, Harmon Killebrew hit a 520 foot home run!, By Minnesota Twins
Harmon Killebrew - Wikipedia
September 18, 1975: Harmon Killebrew hits his 573rd career home run – Society for American Baseball Research
Harmon Killebrew Homer Tribute Chair - Attractions - Baseball Life
Harmon Killebrew
KILLER The Harmon Killebrew Story
Harmon Killebrew Stats & Facts - This Day In Baseball