This lists every First Lady since Ford (i.e., every living First Lady) except Barbara and Laura Bush. I believe that was the point. The will probably attend, but this story (or at least the extract) didn’t include them.
Gotcha. Apparently I missed the point. Lol
http://www.cnn.com/2011/POLITICS/07/12/betty.ford.services/index.html?hpt=hp_c2
Excerpt: “Former President George W. Bush also will attend the service but without his wife, former first lady Laura Bush, who had previous travel commitments, according to a spokesman. Bush’s mother, former first lady Barbara Bush, will attend a private funeral in Michigan on Thursday, the spokesman said.”