Twenty-cent piece (United States coin) (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Twenty-cent piece (United States coin)" in English language version.

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archive.org

Vermeule, p. 73. Vermeule, Cornelius (1971). Numismatic Art in America. Cambridge, MA: The Belknap Press of Harvard University Press. ISBN 978-0-674-62840-3.

Bureau of the Mint, p. 54. Bureau of the Mint (1904). Laws of the United States Relating to the Coinage. Washington, DC: United States Government Printing Office.
Bureau of the Mint, p. 69. Bureau of the Mint (1904). Laws of the United States Relating to the Coinage. Washington, DC: United States Government Printing Office.
Bureau of the Mint, p. 55. Bureau of the Mint (1904). Laws of the United States Relating to the Coinage. Washington, DC: United States Government Printing Office.
Bureau of the Mint, pp. 68–69. Bureau of the Mint (1904). Laws of the United States Relating to the Coinage. Washington, DC: United States Government Printing Office.

Mansfield Journal & 1875-04-29. "The new twenty-cent coin". The Mansfield Herald. April 29, 1875. Retrieved July 25, 2013.