Bill Russell's No. 6 Joins Rare Class of Retired Jersey Numbers
Bill Russell's No. 6 jersey to be retired throughout NBA - NBA.com
Retired number - Wikipedia
NBA Retires Bill Russell's Number 6 League-Wide, Memorial Patches
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NBA to retire Bill Russell's No. 6 jersey across league ahead of
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NBA permanently retires Bill Russell's No. 6 - The Washington Post
Bill Russell's No. 6 jersey to be retired throughout NBA
John Havlicek, Celtics great with mighty steal, dies at 79
Retired number - Wikipedia
Remembering the underappreciated Celtic great John Havlicek
Bill Russell's No. 6 joins rare class of retired jersey numbers
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Fans react as NBA announces that the late Bill Russell's number 6