Black baseball before the Negro Leagues - Beyond the Box Score
Former Negro League player Sam Allen appreciates MLB recognition
Stars Aligned: Negro leagues recognized as major leagues - Sports Illustrated Vault
Polk well represented in Negro League baseball history
Preserving the Negro Leagues - The Source - Washington University in St. Louis
National Pastime Museum: Baseball's Centennial “Greatest Players Ever” Poll – Marty Appel
All-Star Game roster rules FAQ
American sports stars acquire stakes in US Masters T10 League teams
File:1932 Negro League All Star Team Photo.png - Wikimedia Commons
Baseball's recognition of Negro Leagues 'long overdue' to heirs and supporters
MLB Reclassifies Negro Leagues as Major League
The Negro League Stars That MLB Kept Out — And Is Finally Recognizing