- National Baseball Hall of Fame and Museum
 - Official site of the Baseball Hall of Fame presents the history of the sport with an online display of baseball artifacts, photographs, and memorabilia. - Doubleday Field@
- Find sites about the historic baseball stadium in Cooperstown, New York, dedicated to Abner Doubleday in 1916. Web pages include photo sites and historical backgrounder sites.
- Friends of Doubleday Field
- Dedicated to the restoration and preservation of the birthplace of baseball.
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