Mass of Christian Burial for Yvonne Schildberg, 88, of Greenfield, will be Friday at 10:30 am  at the St. John’s Catholic Church in Greenfield.  Burial will be in the Greenfield Cemetery.  Visitation will be Thursday from 2 pm to 8 pm at the church.  Family will greet friends from 6 pm to 8 pm and a Rosary will take place at 5 pm.  In lieu of flowers, memorials may be made to the Iowa Aviation Museum or to the Greenfield Opera House.  Online condolences may be left for the family at steenfunerals.com.  Survivors include:  Children, John E. F. Schildberg III of Greenfield, Richard L. Schildberg of Carroll, Theresa A Estell of Council Bluffs, Gregory M. Schildberg of Casey, William E. Schildberg of Greenfield and Madonna M. Weidman of Council Bluffs.  Foster daughter, Mary G. Johnson of Altoona.  18 grandchildren and 21 great grandchildren.