U.S. National Archives (Record Group 104 [Denver], Sequence 51, Mint Additions) (1935)
Denver Mint correspondence scanned at the National Archives (NARA) in Denver - covering the period 1935-1937. NARA identifier is record group 104, 8KRA-104-84-051. Box 2, Folder 23. Folder 23 title: “Surveys and Soil Test, Notes, Sketches, Records, Etc. ...” Courtesy of John Graffeo.