Beam, George L. (George Lytle), 1868-1935, Eagle River Canyon view looking west or north toward Belden Mine complex - Gilman mine above - eastbound main on left (mp. 296) - westbound main on right. (1922-1930). Denver Public Library Digital Collections, accessed 23/05/2025, https://digital.denverlibrary.org/nodes/view/1056815