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Tönnies, Jan Friedrich (1902-1970)(5)
Tönnies, Ferdinand (1855-1936)(3)
Spranger, Eduard (1882-1963)(2)
Brüggemann, Fritz (1876-1945) [vermutlich](1)
Rudolph, Günther (1930-)(1)
Tönnies, Jan Friedrich (1902-1970) [ermittelt](1)