| Year: | 1969 |
| Author: | Stefan DENAERDE |
| Title: | BUITENAARDSE BESCHAVING. DE PLANEET IARGA |
| Language: | Dutch |
| ||
| Year: | 1969 | |
| Publisher: | Deventer N. Kluwer | |
 |
| Cover | Language | Title | Year | |
|---|---|---|---|---|
| German | MENSCHEN VOM PLANETEN JARGA (Translated by Thomas SCHÜLLER) |
1971 | ||
| English | OPERATION SURVIVAL EARTH (Translated by Jim LODGE) |
1977 | ||
 | Italian | HO INCONTRATO GLI EXTRATERRESTRI | 1978 | |
 | English | UFO... CONTACT FROM PLANET IARGA - A Report of the Investigation | 1982 |
