| Source: Souvenir Program of the 50th Anniversary of the St. Louis Photo-Engravers' Union No. 10, 1898-1948 Location: Labor Collection, Box 1, Archives | |
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| Last Name: | Clark |
| First Name: | H. |
| Middle Name: | E. |
| Page: | 28 |
| Remarks: | listed as secretary, Electrotypers No. 36 |
