Do you have an exact date for Doris' birth? If not her marriage record to Norman may have it. Did Norman get a divorce? If so the papers may prove helpful. Do you know Doris' parents' names? Did she have any siblings? Who did they marry? When and where did they die. Their obituaries may list her which would be especially helpful if she remarried. I ask these questions because they can be helpful in tracking her down. All such clues can be helpful whether you what to know what happened to her or her ancestry.