Johann Friedrich Hellmer – Kölner Adress-Buch 1844
| Given name | Johann Friedrich |
|---|---|
| Family name | Hellmer |
| Occupation | Associé der Fa. J. F. Hellmers & Söhne |
| Address | Rheinaustr. 18 |
| Place | Köln |
| GOV identifier | KOLOLNJO30LW |
| Book | Kölner Adress-Buch 1844 |
| page | 179 |
| Year | 1844 |