| Year: | 1976 |
| Author: | Roy STEMMAN |
| Title: | VISITANTES EXTRATERRESTRES |
| Language: | Spanish/Catalan |
| Originally published as: | VISITORS FROM OUTER SPACE |
| ||
| Year: | 1976 | |
| Publisher: | Nogue, Barcelona, | |
| Serie: | El Mundo de lo Oculto) | |
 |
| Cover | Language | Title | Year | |
|---|---|---|---|---|
| English | VISITORS FROM OUTER SPACE | (Original title) | 1975 | |
| French | EXTRA-TERRESTRES ET SOUCOUPES VOLANTES | 1976 | ||
 | Italian | CONTATTI CON GLI EXTRATERRESTRI (Translated by Anita SPIROLAZZI) |
1976 | |
| German | FLIEGENDE UNTERTASSEN. RÄTSEL IM ALL (Translated by Eva BRÜCKNER-PFAFFENBERGER) |
1978 | ||
| German | DAS WELTALL UND SEINE BESUCHER | 1979 |