Oefen je brein: De compete work-out voor de hersenen in slechts 10 minuten per dag
| Country | USA |
| Brand | Rudolf Steiner Press |
| Manufacturer | Rudolf Steiner Press |
| Binding | Paperback |
| ItemPartNumber | 9781855844889 |
| UnitCount | 1 |
| EANs | 9781855844889 |
| ReleaseDate | 0000-00-00 |