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| Type | Company |
| Location | Germany (Central Europe) |
| Industry | Chemical Industry |
| Holdings | Newspaper clippings: 1974-2005 |
| Signature | A9 H 266 |
| includes | Helm Düngemittel GmbH; Karl O. Helm (Hamburg) |
| URI | https://pm20.zbw.eu/folder/co/011047 |
| ID | co/011047 |