Letter (Perry Rhodan #542)
From Author Wars - https://authorwars.com/books/letter-perry-rhodan-542-1969866.html
Editions/Publications:
- 1972 . Perry Rhodan, #542: Die Stunde des Zentauren (1972, various, Moewig, DM 1.00, 68 pages, digest, MAGAZINE)
- 1972 . Perry Rhodan, #308: Grüner Mond über Jelly-City (1972, various, Moewig, DM 1.00, 68 pages, digest, MAGAZINE)