Cartoon: Terra lacht (Mars — die Welt der Rätsel)
From Author Wars - https://authorwars.com/books/cartoon-terra-lacht-mars----die-welt-der-ratsel-1838553.html
Overview:
Editions/Publications:
- 1967 . Mars — die Welt der Rätsel (1967, Freytag, Moewig, DM 0.80, 64 pages, digest, Chapter Book)