Eine Frau und die Mathematik 1933--1940: der Beginn einer wissenschafltichen Laufbahn by Hel [Helene] Braun. (My translation of the title: A Woman and Mathematics: 1933--1940: the Beginning of a Scientific Career)

Helene Braun (1914-1986) was a number theorist (thesis under Siegel, 1937, in Marburg) Later she worked at Göttingen, IAS Princeton, and mainly Hamburg (from the 50s until her retirement).