| 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 | |
 | |
| Last Name: | Ziegenhein |
| First Name: | H. |
| Volume: | 3 |
| Issue: | 2 |
| Date of Publication: | February, 1915 |
| Page: | 19 |
