Zesde Colonne
| Publisher | A.W. Bruna & Zoon Utrecht/Antwerpen |
| Series | Zwarte Beertjes |
| Translated by | W. van Mancius |
| Cover/Jacket Design by | Dick Bruna |
| Copyright Holder | Robert A. Heinlein, Street And Smith Publications, Inc. |
| Printed by | Van Boekhoven-Bosch nv |
| Format | Pocket book |
| Language | Dutch |
| Location | Utrecht/Antwerpen |
| This Edition Published | 1970 |
| Copyright | 1949 |
| Copyright | 1941 |
| Pages / Font | 175 pages |
| Series Number | 1389 |
| ISBN 10 | 90 229 1389 9 |
| Other | D/1970/0939/247 |
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