I'm new at researching my family tree and need some guidence to start my Mother's side of Family Tree.
My Grandmother's surename was Mary Petro(Birescik) Born 1911-Death 1983 in Clairton,Allegheny PA.
Her father was Mike Petro Born abt1874 in Checkloslavakia -?, his wife Mary Chupak Born abt1875 in Checkloslavakia.
They resided in 1930 in Clairton,Allegheny,PA.
All relatives knowing more than this are deceased.
I am trying to locate more information on Petro but nothing seems to be matching up.
Any guidence on where and how to continue research on Petro or Birescik would be so appreciated.