Die schwarze Schnur

From Author Wars - https://authorwars.com/books/die-schwarze-schnur-1808018.html

Overview:

Title: Die schwarze Schnur
Author: Paul Alfred Müller
Year: 1959
Type: Novels
Series: Sun Koh Abenteuer (Fix-ups)
Number in Series: 23

Variant Titles:

1959. Die schwarze Schnur