Mrs. Rosella Mikula, 1111 Sussex Dr., died at 2:30 p.m. Monday in St. Joseph's Memorial Hospital after an illness of five years.  She was born in South Bend on Sept. 4,1901 and was married on Feb. 10, 1920, to Anthony Mikula, who survives.  She was the former Miss Rosella Abraham.  Other survivors are two daughters, Mrs. Gertrude Schreiner and Mrs. Lorraine Hadary, and two sons, Edward and Stanley, all of South Bend; seven grandchildren and a sister, Mrs. Helen Olah of Dearborn, Mich.  Friends may call after 7 p.m. today in the St. Joseph Funeral Home.  Services will be at 9 a.m. Thursday in St. Stanislaus Catholic Church with Rev. Sigmund A. Jankowski, C.S.C, pastor, officiating.  Burial will be in St. Joseph Cemetery.