The book of 156 pages summarizes the (partially revised) articles publihed by the author in the philatelic magazine BRIEFMARKEN-REVUE over several years . This volume has been edited in 2022 by the special working group DDR-Spezial.
For internal usage: This working group is not IMOS member, but the author is a longtime active member of the IMOS and the former Olympic and Sports Collectors Club Club Berlin.