Das Schlüsselwort

From Author Wars - https://authorwars.com/books/das-schlusselwort-1600937.html

Overview:

Title: Das Schlüsselwort
Author: Isaac Asimov
Year: 1968
Type: Short Fiction

Editions/Publications:

Unknown. Flucht in die Vergangenheit (Unknown, Isaac Asimov, Heyne, DM 2.40, 156 pages, Paperback, Anthology)