Geheimnisvolle Städte unter der Erde

From Author Wars - https://authorwars.com/books/geheimnisvolle-stadte-unter-der-erde-2862914.html

Overview:

Title: Geheimnisvolle Städte unter der Erde
Author: uncredited
Year: 1980
Type: Essays

Editions/Publications:

Unknown. SF Perry Rhodan Magazin, 7/80 (Unknown, uncredited, Pabel, DM 2.80, 64+viii pages, quarto, MAGAZINE)