GAGNON - Mary Therese (nee Kiefer) December 18, 2010, beloved wife of the late Leo Paul Gagnon, Ph.D.; devoted mother of Joseph Gagnon, Rose Gautreau and Julia (Ron) Schmidt, Paul (Kathleen) Gagnon, Jennifer Schnorr and Lorraine (John) Vilardo; grandmother of 12 grandchildren and one great-grandchild; dear sister of Joseph, Anna Marie and James Kiefer. Friends may call Monday from 7-9 and Tuesday from 2-4 and 7-9 at THE DIETRICH FUNERAL HOME, INC., 2480 Kensington Ave., Amherst. A Mass of Christian Burial will be celebrated at St. Gregory the Great Church on Wednesday at 9:30 AM. Please assemble at church. Flowers are gratefully declined. Memorials may be made to The Blue Cloud Abbey, PO Box 98, Marvin, SD 57251. Share your condolences at www.TheDietrichFuneralHome.com