Letters And Reports Sent To The Superintendent Of The Denver Mint By The Melter & Refiner's Department, 1906-1940.
U.S. National Archives (Record Group 104, [Denver] Entry 23, Copies of Letters Sent to the Superintendent 1906 - 1940) (1906)
Denver Mint correspondence scanned at the National Archives (NARA) in Denver - covering the period 1906-1940. Record group 104, entry 23, from box 1. Courtesy of John Graffeo.