Historic Addressbooks Addressbook entry for Friedrich DUFFING
| Family name | Duffing |
|---|---|
| Given name | Friedrich |
| Occupation | Direktor |
| Address | Gerberstr. 10 |
| Place | Krefeld |
| Source |
Adreßbuch der Stadt Krefeld-Uerdingen a. Rh. 1931-32 1931, Seite 55 |