2021 Relativity
2021 Relativity
Wiebe Uilkes Zijlstra(16 Jan 1872 - 2 Oct 1946)
Lolkje Posthuma(28 Oct 1874 - 22 Feb 1947)
Pieter Zylstra
Gezina Hekstra
b. 22 Nov 1908, Kollumerland, Friesland
d. 16 Mar 1990, Grand Rapids, MI
b. 1912
d. 6 Dec 2012, Grandville, MI