| DeWitt, Roy A.; ISMA Directory; 1927 | ISMA Directory | 1927-00-00 | | Captain |
| DeWitt, Roy A.; ISMA Directory; 1928 | ISMA Directory | 1928-00-00 | | Captain |
| DeWitt, Roy A.; ISMA Directory; 1929 | ISMA Directory | 1929-00-00 | | Captain |
| DeWitt, Roy A.; ISMA Directory; 1931 | ISMA Directory | 1931-00-00 | | Captain |
| DeWitt, Roy A.; ISMA Directory; 1932 | ISMA Directory | 1932-00-00 | | Captain |
| DeWitt, Roy A.; ISMA Directory; 1933 | ISMA Directory | 1933-00-00 | | Captain |
| DeWitt, Roy A.; ISMA Directory; 1935 | ISMA Directory | 1935-00-00 | | Captain |
| DeWitt, Roy A.; ISMA Directory; 1936 | ISMA Directory | 1936-00-00 | | Captain |