Pohlmann / Kessing, 2009, handbook and catalogue of the German navy ship+é¦s mail and Navy postal service 1895-1914, after many years the research set the Authors Lutz Pohlmann and Juergen Kessing with the, handbook and catalogue of the German navy ship+é¦s mail and Navy postal service 1895-1914\" this extensive work before, the friend and collector of the area for his characteristic research and collecting activities permanent Companion be becomes.