| Source: Union Electric Company employee magazines (titled Wire and Pipe, Union Electric Magazine, and Union Electric News), 1920-1930, 1941, 1954, 1956-1967 (incomplete run) Location: Dewey Stacks / Range 17B / Side A | |
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| Corporate Name: | W.F. Williamson Advertising Service |
| Volume: | 11 |
| Issue: | 4 |
| Date of Publication: | April 1923 |
| Page: | 7 |
| Publication Title: | Wire and Pipe |
