Erich Bessel-Hagen
Erich Bessel-Hagen ( 12 September 1898 in Charlottenburg – 29 March 1946 in Bonn ) was a German mathematician and a historian of mathematics . 
<triplet> Erich Bessel-Hagen <subj> 12 September 1898 <obj> date of birth <subj> 29 March 1946 <obj> date of death <subj> Bonn <obj> place of death