Heydler, John, 1869 - 1956.
| Role | Title | Holding Repository | |
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| referencedIn | National League of Professional Baseball. National League Meetings, Minutes, Conferences and Financial Ledgers : records 1876-1992 1899-1992. | National Baseball Hall of Fame and Museum | |
| referencedIn | Office of the Commissioner. Federal League Suit : papers 1914-1945. | National Baseball Hall of Fame and Museum |
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| associatedWith | National League of Professional Baseball. | corporateBody |
| associatedWith | Office of the Commissioner. | corporateBody |
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Person
Birth 1869
Death 1956
