Michel - Übersee-Katalog Japan, Korea, Mongolei, GUS in Asien 2020

42nd edition; worldcatalogue of postage stamps overseas part 9.2: Armenia, Azerbaidzjan, Batum, Berg-Karabach, Georgia, Japan, Japanese occupation in World War II, Kazachstan, Kirgisia, Korea North & South, Mongolia, Ryu Kyu Islands, Tadzjikistan, Transcaucasia, Turkmenistan, Tuva & Uzbekistan, with stamp booklets Japan and South Korea, also features FDC Japan; valuations in Euro; now with many new colour images!, 1440 pp in colour, in German, published 2019