Sofia Fetsko Cekoski;69;of 812 Belle St.;Belle Vernon;died Friday;July 28;1989;at 10:25 a.m.in Mon Valley Hospital.  She was born Aug.19;1919;in Roscoe;a daughter of the late Michael and Ann Fetsko.  She was a member of St.Sebastian Roman Catholic Church;Belle Vernon.  She had resided in the Belle Vernon area for the past 34 years.  Survivors include her husband Joseph W.Cekoski;one daughter;Carol Cekoski of Pittsburgh;three sisters;Mrs. John (Ann) Roseman;Mary Fetsko and Margaret Fetsko;all of Roscoe.  Friends will be received Saturday from 7 to 9 p.m.and Sunday from 2 to 4 and 7 to 9 p.m.in the Leonard J.Parzynski Funeral Home;626 Broad Ave.;Belle Vernon.  A Prayer service will b held Monday at 9:30 a.m.in the funeral home;followed by Mass of Christian Burial at 10 a.m.in St.Sebastian Roman Catholic Church;Belle Vernon.  Burial will be in Belle Vernon Cemetery.  The Leonard J.Parzynski Funeral Home is in charge of the arrangements.