| Source: Laclede News, 1956-1963, 1965-1969 (incomplete run) Location: Gephardt Stacks 12.6.2 | |
 | |
| Last Name: | Dueker |
| First Name: | Joseph |
| Middle Name: | A. |
| Portrait: | yes |
| Volume: | 23 |
| Issue: | 1 |
| Date of Publication: | January 1959 |
| Page: | 12, 15 |
| Remarks: | in list of employees marking anniversaries with the company |
