Koen har 4 hjørner
| Format | Paperback |
| Language | Danish |
| Copyright | 1963 |
| Original Title | La foirre aux cancres |
| Original Language | French |
| Author | Jean Charles |
| Publisher | Borgens Forlag |
| Publisher Series | Borgens Billigbøger |
| Cover Artist | Flemming Quist Møller |
| Illustrator | Flemming Quist Møller |
| Printed by | Reproset |
| Translated by | Otto Sigvaldi Petersen |
| Format | Paperback |
| Language | Danish |
| Location | Denmark |
| Copyright | 1963 |
| This Edition Published | 1973 |
| Pages / Font | 167 pages |
| ISBN | 87 418 1269 7 |
| Other | 2. Danish edition, 1. Imprint |
| Series Number | 133 |