Planet der Finsternis

From Author Wars - https://authorwars.com/books/planet-der-finsternis-2076828.html

Overview:

Title: Planet der Finsternis
Author: Jay Grams
Year: 1960
Type: Novels

Editions/Publications:

Unknown. Planet der Finsternis (Unknown, Jay Grams, Bewin, DM 6.80, 245 pages, Hardcover, Novel)
1961 . Planet der Finsternis (1961, Jay Grams, Moewig, DM 0.60, 64 pages, digest, Novel)