Hi Nancy, a Joanne L. Ford, 541-26-0584, last residence=Clackamas, b. 14 Dec 1928 died 7 July 1996. Her soc. sec. # was assigned in OR before 1951. Source: Social Security Death Index which anyone can access at no charge.
A Joanne Louise Ford died Clackamas Co., 5 July 1996 per death cert #96-15383, age 67, born 14 Dec. 1928. Source: OR Death Index.
Since the children were born after the 1930 Census there is no easy way to track them. My best suggestion is to find Joanne's obituary. Check out www.raogk.org, choose Oregon, choose Clackamas Co. to find a volunteer who look up the obituary. Sorry it was such bad news.