// todo need optimize like in event.jsp. Add indexing or not indexing this page. 30th Calvin Coolidge (jan 1, 1923 – mar 4, 1929) (Timeline)

30th Calvin Coolidge (jan 1, 1923 – mar 4, 1929)

7 Feb 2019

jan 1, 1923

mar 4, 1929

~ 6 years and 2 months

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