| Source: St. Louis, the Fourth City: Pictorial and Biographical, Deluxe Supplement (St. Louis: S.J. Clarke, 1912) Location: St.L. / 9 / St4 / supp | |
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| Last Name: | Timmerman |
| First Name: | Mary |
| Middle Name: | C. |
| Maiden Name: | Hackman |
| Volume: | 1 |
| Page: | 80-82 |
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