*[http://www.trumanlibrary.org/oralhist/havlik.htm Oral History Interview with Hubert F. Havlik], Truman Presidential Library, June 20, 1973. | *[http://www.trumanlibrary.org/oralhist/havlik.htm Oral History Interview with Hubert F. Havlik], Truman Presidential Library, June 20, 1973. |