2021 Relativity
2021 Relativity
Franciszek Piasecki(1 Nov 1867 - 16 Jan 1923)
Franciszka Kwasniewska(1874 - 6 Mar 1942)
John Francis Piasecki
Frances Slavinski
b. 24 Jun 1909, Brooklyn, NY
d. 29 Nov 1969, Brooklyn, NY
b. 1910, NJ
d.