Ballparks: 1871 - Present
October 30, 1871: The first pennant race: Chicago White Stockings vs. Philadelphia Athletics – Society for American Baseball Research
Green Cathedrals: The Ultimate Celebration of All Major League and Negro League Ballparks (Fifth Edition) by Philip J. Lowry - Ebook
Column: Here's how Padres, MLB can make fans without any in ballparks - The San Diego Union-Tribune
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Baseball and the Civil War: Forging America's National Pastime
Which MLB stadiums have a real organist? - Quora
Home runs are killing baseball - AS USA
Beyond the Ballpark: The Honorable, Immoral, and Eccentric Lives of Baseball Legends [Book]
Preservation and Ballparks: A Survival Guide for the American Ballpark
Ballparks Past and Present