Celebration of life services for 90 year-old Mary Duwa, formerly of Riverside, will be Friday at 10:30 a.m. at St. Mary’s Catholic Church in Riverside.  Burial will be in Mt. Olivet Cemetery in Riverside.  Visitation will be Thursday from 4:00 to 7:00 p.m. at the Peterseim Funeral Home in Kalona, with a prayer service at 7:00.  A memorial fund has been established for the Mercy Hospital Hospice Unit and the American Diabetes Foundation.