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Calvin Coolidge - Wikipedia
Presidency of Calvin Coolidge - Wikipedia
Calvin Coolidge | Biography, Presidency, Quotes, & Facts
Calvin Coolidge - HISTORY
Calvin Coolidge - The White House
Calvin Coolidge - Facts, Nickname & Wife - Biography
The Life and Presidency of Calvin Coolidge
Calvin Coolidge: Impact and Legacy - Miller Center
Calvin Coolidge - White House Historical Association
Calvin Coolidge: Campaigns and Elections - Miller Center