2021 Relativity
2021 Relativity
Derk (Dick) Boersema(20 Jan 1872 - 22 Feb 1954)
Derktje Lanenga(31 Dec 1874 - 14 May 1955)
m. 4 Mar 1965
Charles (Tjeert) Boersema
Catherine Rispens
b. 26 Mar 1900, Groningen
d. 17 Aug 1969, Westchester, IL
b.
d.