Why are some Steelers jersey numbers sacred, but others aren't? - Behind the Steel Curtain
Pittsburgh Steelers to Retire Joe Greene's Number '75'
Pittsburgh Steelers to retire Franco Harris' No. 32 to honor 50th anniversary of Immaculate Reception - ESPN
Pittsburgh's GOAT Mountain of sports: Roberto Clemente, Franco Harris, Mean Joe Greene, Mario Lemieux
Pittsburgh Steelers All-Franchise Team - Last Word on Pro Football
Franco Harris 'Blown Away' By Steelers Choosing To Retire His Jersey - Steelers Depot
Taking Number 75 Off the Shelf, Steelers Retire Mean Joe Greene's Jersey
Mean Joe Greene's Jersey No. 75 Officially Retired - CBS Pittsburgh
Recounting the bond among Joe Greene and his Steel Curtain brothers - Sports Illustrated
Pittsburgh Steelers to Retire Joe Greene's Number '75'
Photos: Steelers retire Joe Greene's jersey number