Letters (Perry Rhodan #544)
From Author Wars - https://authorwars.com/books/letters-perry-rhodan-544-1971967.html
Editions/Publications:
- 1972 . Perry Rhodan, #544: Die Späher der GEVARI (1972, various, Moewig, DM 1.00, 68 pages, digest, MAGAZINE)
- 1972 . Perry Rhodan, #310: Das Geschenk der Zeitreisenden (1972, various, Moewig, DM 1.00, 68 pages, digest, MAGAZINE)