Heinemann · Holmes & Meier Pub
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Labrinths Okigbo | 978-0-435-90631-3 (0-435-90631-3) | 1971 |
| Labyrinths with Path of Thunder. . | 978-0-435-90062-5 (0-435-90062-5) | 1971 |
| Labyrinths With Path of Thunder | 978-0-8419-0016-5 (0-8419-0016-7) | 1971 |