Richard P. Feynman, Robert B. Leighton, Matthew Sands (2015). “The Feynman Lectures on Physics, Vol. I: The New Millennium Edition: Mainly Mechanics, Radiation, and Heat”, p.118, Basic Books
United States. Department of the Treasury, Alexander Hamilton (1828). “Reports of the Secretary of the Treasury of the United States, Prepared in Obedience to the Act of the 10th May, 1800: ... to which are Prefixed, the Reports of Alexander Hamilton, on Public Credit, on a National Bank, on Manufactures, and on the Establishment of a Mint ... Printed by Order of the Senate of the United States”, p.109