Gäste aus dem Weltraum?

From Author Wars - https://authorwars.com/books/gaste-aus-dem-weltraum-2387966.html

Overview:

Title: Gäste aus dem Weltraum?
Author: Arthur C. Clarke
Year: 1969
Type: Essays

Editions/Publications:

Unknown. Unsere Zukunft im Weltall (Unknown, Arthur C. Clarke, Fischer Bücherei, 287 pages, Paperback, Non-fiction)