He was survived by his two children , seven grandchildren , and four great - grandchildren .
David Bell died of leukemia on September 6 , 2000 , in Cambridge , Massachusetts , at the age of 81 .
David Bell was survived by David Bell 's two children , seven grandchildren , and four great - grandchildren .
David Bell died of leukemia on September 6 , 2000 , in Cambridge , Massachusetts , at the age of 81 .