The Sigma Chapter (#18) Installed at Arizona State College on November 12, 1949. The installing officers were J. Lee & Mrs. Joyce Burke. Charter Members include: Ruth Tollefarud, Carol Thiel, Phyllis Rugger, Florence Kilpatrick, Florence Kiehler, Barbara Heavin, Helen Camp, Sue Beelar, Shirley James, Caroline Kilpatrick, Carolyn Bagnoli.