| 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: | Page Avenue Substation, Union Electric Light and Power Co. |
| Building Illustration: | Yes |
| Volume: | 9 |
| Issue: | 6 |
| Date of Publication: | June, 1921 |
| Page: | front cover |
