| Source: Union Electric Company employee magazines (titled Wire and Pipe, Union Electric Magazine, Union Electric Quarterly, and Union Electric News), 1913-1969 (incomplete run) Location: St.L. / 05 / Un3, Un3b, Un3m | |
 | |
| Corporate Name: | Duncan Foundry & Machine Works |
| Building Illustration: | yes |
| Volume: | 19 |
| Issue: | 9 |
| Date of Publication: | September 1931 |
| Page: | 16-17 |
| Remarks: | includes interior view of foundry in Alton, Illinois |
