Constantin Ertel – Adressbuch der Haupt- und Residenz-Stadt Breslau 1868
| Given name | Constantin |
|---|---|
| Family name | Ertel |
| Occupation | Maurergeselle |
| Address | Neudorf 69 |
| Place | Breslau |
| GOV identifier | BREADTJO81MC |
| Book | Adressbuch der Haupt- und Residenz-Stadt Breslau 1868 |
| page | 63 |
| Year | 1868 |