October 6, 1931: Earnshaw throws two-hit shutout to even Fall Classic – Society for American Baseball Research
Jimmie Foxx and Al Simmons sign autographs - Baseball Egg
104 Mickey Cochrane” Baseball Stock Photos, High-Res Pictures, and Images - Getty Images
Grove, Cochrane began Hall of Fame careers together
July 31, 1932: Lefty Grove shuts out Indians in first game at Cleveland Stadium – Society for American Baseball Research
Bob lefty Grove Shibe Park Ca. 1925-33 Framed Vintage
Games People Play: “Baseball Magazine,” October 1929 -The Homestead Blog
Ballparks Shibe Park - This Great Game
133 Connie Mack Philadelphia As Manager Stock Photos, High-Res Pictures, and Images - Getty Images
Connie Mack – Society for American Baseball Research
Lefty Grove – Society for American Baseball Research
Expert poring over long-lost Philadelphia A's records
Mickey Cochrane Stats & Facts - This Day In Baseball
Sports - 1929 Philadelphia Athletics (Any Medium): Doyle Collection Set Image Gallery
Simply the Best: The Story of the 1929-31 Philadelphia Athletics eBook : Topel, Brett: Kindle Store