Der Zeitdamm — was ist das?

From Author Wars - https://authorwars.com/books/der-zeitdamm----was-ist-das-1599326.html

Overview:

Title: Der Zeitdamm — was ist das?
Author: uncredited
Year: 1983
Type: Essays

Editions/Publications:

1983 . Perry Rhodan, #1140: Der Eindringling (1983, uncredited, Pabel-Moewig, DM 2.00, 72+xii pages, digest, MAGAZINE)