Runkel, W. M., & Souder, S. T. (1876). The United States Mint: A brief history of the institution, with a full description of the manner in which gold, silver, nickel and copper are converted into money. Philadelphia: S.T. Souder & Co..

Runkel, William M., and Stephen T. Souder. The United States Mint: A Brief History of the Institution, With a Full Description of the Manner in Which Gold, Silver, Nickel and Copper Are Converted Into Money. Philadelphia: S.T. Souder & Co., 1876.

Runkel, William M., and Stephen T. Souder. The United States Mint: A Brief History of the Institution, With a Full Description of the Manner in Which Gold, Silver, Nickel and Copper Are Converted Into Money. Philadelphia: S.T. Souder & Co., 1876.