HALLOWED GROUND: Monument Park, New York Yankees Museum honor greatest players from most legendary team in sports - Sports Collectors Digest
High and Tight: Our Rock & Roll Baseball Experts Talk Retired Numbers
Power of Derek Jeter's No. 2 - MLB's most productive jersey numbers
The Yankees Retire Paul O'Neill's Number 21 - The New York Times
The Yankees are worth $6bn: why won't they pay $9 for their players' wifi?, New York Yankees
As cases for Roy Halladay and Dick Allen point out, baseball's retired numbers are multiplying
A number of nuggets about retired numbers around the Major League
Yankee Stadium: Monument Park - Retired Numbers - Lou Gehrig #4
List of Major League Baseball retired numbers - Wikipedia