Letters (Perry Rhodan #1917)
From Author Wars - https://authorwars.com/books/letters-perry-rhodan-1917-2192812.html
Editions/Publications:
- 1998 . Perry Rhodan, #1917: Die Rätsel von Ketchorr (1998, various, Pabel-Moewig, DM 3.00, 68 pages, digest, MAGAZINE)