Olga M.Martin;65;formerly of Belle Vernon;died Monday;Aug.18;1975;at 7:41 p.m.in the State Hospital;Torrance;where she resided. She is survived by a brother;William P.Martin of Charleroi and several nieces and nephews. Friends will be received at the Shelby D.Ferguson Funeral Home;Belle Vernon;after 7 p.m.Tuesday and from 2 to 4 and 7 to 9 p.m.Wednesday. Services will be held Thursday at 11 a.m.at the funeral home with the Rev.Charles Colas;pastor of First Baptist Church;Belle Vernon;officiating. Interment will follow in Belle Vernon Cemetery. Shelby D.Ferguson is funeral director in charge.