| 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 | |
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| Corporate Name: | St. Charles St. substation, Union Electric Light & Power Co. |
| Building Illustration: | Yes |
| Volume: | 18 |
| Issue: | 7 |
| Date of Publication: | July, 1930 |
| Page: | 14-16 |
