Circular No. 603-12 - Preference in Promotion, May 19, 1917
written by Chester Harding, 1866-1936, in Records of the Panama Canal, 1848 - 1999 (RG185). General Records, 1914 - 1934 (A1 34-B), of United States. National Archives and Records Administration. Federal Records (1917), Box 37, 2-C-55 Part 1a, Employment of Colored American Citizens - General, n.d. to December 31, 1917 , 1 page(s)