| Source: Southwestern Telephone News (St. Louis: Southwestern Bell Telephone Co.), 1917-1955 (incomplete run) Location: St.L. / 05 / So89 | |
 | |
| Corporate Name: | Main Exchange |
| Building Illustration: | Yes |
| Address: | 4th & Olive Sts. |
| Volume: | 22 |
| Issue: | 2 |
| Date of Publication: | Summer 1935 |
| Page: | 14 |
| Remarks: | historic photograph of main telephone exchange |
