| Source: United Railways Bulletin, 1915-1923 (published monthly for distribution among the employees of the United Railways Company of St. Louis) (incomplete run) Location: St.L. / 05 / Un35 | |
 | |
| Last Name: | Yertanna |
| First Name: | Rudolph |
| Volume: | I |
| Issue: | 11 |
| Date: | November 15, 1915 |
| Page: | 14 |
