2021 Relativity
2021 Relativity
Derk (Dick) Boersema(20 Jan 1872 - 22 Feb 1954)
Derktje Lanenga(31 Dec 1874 - 14 May 1955)
m. 19 Oct 1928
Albert vander Horst
Jetje Boersema
b. 25 Jun 1898
d. 7 Apr 1982
b. 6 Apr 1902, Bedum, Groningen
d.