ROCK FALLS – Mary E. Robertson, 78, of Rock Falls, died Thursday, Sept. 27, 2012, at CGH Medical Center in Sterling. She was a mental health technician at the Jack Mabley Center for 33 years, retiring in 1997.

She was born July 25, 1934, in Rock Falls, the daughter of Albin and Helen (Crotts) Frieberg.

Survivors include two sons, Harold Pessman and Roger Pessman, both of Rock Falls; three daughters, Linda (Bob) Robbins of Rock Falls, Lorna Witherow of Lyndon and Sheri (Keith) Argraves of Rock Falls; three brothers, Albin (Linda) Frieberg of California, and Lewis (Carolyn) Frieberg and Robert (Diane) Frieberg, both of Rock Falls; two sisters, Pat Nesbitt of Rock Falls and Diane Hambley of Sterling; nine grandchildren; 20 great-grandchildren; and three great-great-grandchildren.