found: Weydt, H. Partikel-Bibliographie, c1987:t.p. (Klaas-Hinrich Ehlers) cover p. 4 (studies German and philosophy at the Free University of Berlin)
found: His Das dynamische System, c1992:t.p. (Klaas-Hinrich Ehlers) cover (b. 1959 in Braunschweig; Karls-Univ., Prague)
found: Geschichte der mecklenburgischen Regionalsprache seit dem Zweiten Weltkrieg, 2018:t.p. (Klaas-Hinrich Ehlers) back cover (lecturer of German linguistics at the Free University of Berlin; works for the Norddeutscher Sprachatlas; his research interests include regional dialect of northern Germany, the history of the politeness in language, and the history of lingusitics)
