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List of presidents of the United States - Wikipedia
list of presidents of the United States - Encyclopedia Britannica
List of U.S. Presidents in Chronological Order - HistoryNet
John Adams - Wikipedia
John Adams - The White House
John Adams | Biography, Political Party, Children, Presidency,
Presidents - The White House
Biography of John Adams, 2nd President of the United States
List of presidents of the United States - Wikiwand
Presidents of the United States - Encyclopedia Britannica