| 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 | |
 | |
| Corporate Name: | Swiss Mixed Chorus of St. Louis |
| Volume: | 15 |
| Issue: | 6 |
| Date of Publication: | March 19, 1957 |
| Page: | 1, 4, 6 |
| Publication Title: | Union Electric News |
