Das Rätsel Sigma

From Author Wars - https://authorwars.com/books/das-ratsel-sigma-2778153.html

Overview:

Title: Das Rätsel Sigma
Author: Karl Fischer
Year: 1974
Type: Interior Art

Editions/Publications:

Unknown. Das Rätsel Sigma (Unknown, Karl Fischer, Neues Leben, M 5.40, 270 pages, Hardcover, Novel)