April 15, 1997: Ken Griffey Jr. wears number 42 to honor Jackie Robinson on 50th anniversary – Society for American Baseball Research
Robinson's 42 in Dodger blue for all uniforms on April 15 - The San Diego Union-Tribune
All of MLB to wear Jackie Robinson's No. 42 in Dodger Blue on April 15 - ESPN
Angels and Mariners lock arms in show of support on Jackie Robinson Day – Orange County Register
Gott's Thoughts: College baseball needs to retire the No. 42 jersey to honor Robinson - Daily Bruin
Baseball's Jackie Robinson Day Needs to Be More Than Just a Gesture
MLB allows more players to wear No. 21 to honor Roberto Clemente – NBC Sports Chicago
Players, Coaches, Umpires Wearing No. 42 to Honor Jackie Robinson
All players wearing 42 wrong way to honor Jackie
Dodgers gather at Jackie Robinson statue to pay respects
Jackie Robinson's Long Fight Against Discrimination, by Seth S. Tannenbaum, Weekend Caucus
Boston blasts cast pall over Jackie Robinson Day
What Happens to All Those No. 42 Jerseys? - The New York Times