Bill Russell's No. 6 Joins Rare Class of Retired Jersey Numbers
A Rough History of Football's Retired Shirt Numbers
Alexander: There's no single standard for retired numbers – Orange
Players now have jersey numbers, and teams can retire jersey
NBA honors Bill Russell by retiring uniform No. 6 throughout
Retired jerseys - BYU Athletics - Official Athletics Website - BYU
Why don't the Cowboys retire the jersey numbers of their legends
It's time for the Tigers to retire more uniform numbers - Vintage
Which jersey numbers have the Utah Jazz retired? - Deseret News
How many numbers have the SF Giants retired?
New York Yankees retired numbers: Is team too generous? - Sports
Why don't the Miami Marlins have any retired numbers?