This primary source comes from the Records of the U.S. Marine Corps.
Full Citation: Roberto Clemente's Report of Separation (DD 214); 9/11/1964; Official Military Personnel File of Roberto C. Walker (Roberto Clemente); Official Military Personnel Files, 1905 - 1998; Records of the U.S. Marine Corps, Record Group 127; National Archives at St. Louis, St. Louis, MO. [Online Version, https://docsteach.org/documents/document/roberto-clementes-honorable-discharge-from-the-us-marines-corps, May 14, 2024]