Klein was born in Szatmárnémeti (present-day Satu Mare), in Partium--a region of Austria-Hungary at the time, it is now in Romania; he received his PhD at the University of Vienna in 1925.
Klein was born in Szatmárnémeti (present-day Satu Mare) at the time, it is now in Romania. This is in Partium--a region of Austria-Hungary. He received his PhD at the University of Vienna in 1925.