Letters (Das Vermächtnis der Marsgötter)
From Author Wars - https://authorwars.com/books/letters-das-vermachtnis-der-marsgotter-2636035.html
Editions/Publications:
- 1957 . Das Vermächtnis der Marsgötter (1957, various, Pabel, DM 1.00, 95 pages, digest, Novel)