Müller-Mark, E., Old Germany under the magnifying glass, 5th edition, Berged ...

Müller-Mark, E., Altdeutschland unter der Lupe, 5th edition, Bergedorf, Braunschweig, Bremen, 1959, here the first edition, which is interesting from a philatelic history perspective, was published by Müller-Mark itself, the rest of the edition was then published by the short-lived publishing house of Schätzle & Jakubek, Kurfürstendamm 216, 1 Berlin 15, #67299