Johann Josef Mertznich – Kölner Adreß-Buch 1846
| Given name | Johann Josef |
|---|---|
| Family name | Mertznich |
| Title | Dr. med. |
| Address | Kleine Neugasse 1B |
| Place | Köln |
| GOV identifier | KOLOLNJO30LW |
| Book | Kölner Adreß-Buch 1846 |
| page | 277 |
| Year | 1846 |
| Given name | Johann Josef |
|---|---|
| Family name | Mertznich |
| Title | Dr. med. |
| Address | Kleine Neugasse 1B |
| Place | Köln |
| GOV identifier | KOLOLNJO30LW |
| Book | Kölner Adreß-Buch 1846 |
| page | 277 |
| Year | 1846 |