2021 Relativity
2021 Relativity
Pieter Jansma(23 Jan 1883 - 10 Jun 1965)
Janke de Vries(31 Dec 1894 - 22 Dec 1980)
Jan Jansma
Idzinga
b. 13 May 1931
d. 17 Jul 2000
b.  
d.  
Children
Pieter Jansma
updated 3/27/21
copyright 2021 Jean Wisner Dupon