Pirates' PNC Park facts and figures
A ranking of the 45 ballparks where I've seen MLB games, Part 3
Ballparks Pittsburgh Pirates
Pittsburgh and Its Ballpark: An Appreciation
Three Rivers Stadium, Pittsburgh (Pa.), 22 August 1999
Three Rivers Stadium: At The Beginning - Behind the Steel Curtain
Three Rivers Stadium - history, photos and more of the Pittsburgh
Three Rivers Stadium - history, photos and more of the Pittsburgh
A ranking of the 45 ballparks where I've seen MLB games, Part 3
Three Rivers Stadium (Pittsburgh) – Society for American Baseball