| Source: Booklet of the South St. Louis Gymnastic Society, 1905-1906 Location: Koch Family Papers, Archives | |
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| Last Name: | Mertens |
| First Name: | Waldemar |
| Address: | 2830 Missouri Ave. |
| Page: | 29 |
| Remarks: | in list of members of South St. Louis Turnvereins |
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