May 1, 1920: Babe Ruth's first Yankee home run is a 'colossal

Old News in Baseball, №1, by John Thorn

Babe Ruth's Three-Run Homer Opening Day at the New Yankee Stadium a Century Ago, At the Smithsonian

Did Babe Ruth out-homered every American League team in 1920's? Has any player done this feat since? - Quora

May 7, 1921: Bob Meusel hits for the cycle as Ruth wallops longest home run ever at Griffith Stadium – Society for American Baseball Research

Was Willie Mays ever considered as being a serious threat to surpassing Babe Ruth and becoming the home run king? - Quora

September 21, 2008: The final game at Yankee Stadium – Society for American Baseball Research

May 1, 1920: Babe Ruth's first Yankee home run is a 'colossal clout' against Red Sox – Society for American Baseball Research

Red Sox -Yankees Opening Day Postponed Until Friday

Babe Ruth's Autobiography, as Written in 1920, by John Thorn

Which New York Yankee and MLB Hall of Famer hit the first home run in the original Yankee Stadium? - Quora

Ten Babe Ruth Baseball Cards That Look Undervalued

Babe Ruth clubs his first major league homer

Home Run Era in Baseball Staffed About 1920, With Babe Ruth in Principal Role - The New York Times