De Harde Kern I
| Cover Art by | Ron van Roon |
| Format | Pocket book |
| Language | Dutch |
| Location | Rainbow Pocketboeken Amsterdam i.s.m. G.A. van Oorschot, Amsterdam |
| Reprinted | 1999-01-01 |
| Pages / Font | 1020 pages |
| ISBN | 90-417-077-X |
Added by keesie13
| Cover Art by | Ron van Roon |
| Format | Pocket book |
| Language | Dutch |
| Location | Rainbow Pocketboeken Amsterdam i.s.m. G.A. van Oorschot, Amsterdam |
| Reprinted | 1999-01-01 |
| Pages / Font | 1020 pages |
| ISBN | 90-417-077-X |