Robert Mertens – Adressbuch Essen 1936
| Given name | Robert |
|---|---|
| Family name | Mertens |
| Occupation | Masch. Ing. |
| Address | Bernhardstr. 16a |
| Place | Essen |
| GOV identifier | ESSSENJO31ML |
| Book | Adressbuch Essen 1936 |
| page | I-381 |
| Year | 1936 |
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