2021 Relativity
2021 Relativity
Jan Dupon(7 Jun 1879 - 11 Sep 1966)
Wietske Kobus(26 Apr 1882 - 14 Feb 1952)
Sjoerdje Dupon
b. Jan 1921
d. 30 May 1921
updated 3/27/21
copyright 2021 Jean Wisner Dupon