Ibis Communications
Eyewitness to History: Calvin Coolidge Is Sworn in as President, 1923
Calvin Coolidge's account of the night he was hurriedly sworn in as president after the death of President Warren G. Harding.
A&E Television
History.com: American Presidents: Calvin Coolidge
This easy-to-navigate site has Calvin Coolidge's biography, events occurring during his presidency, an image gallery, and several video clips.