World Health Organization, 1977. National Center for Health Statistics. Instruction manual, part 9. ICD-9 underlying cause of death lists for tabulating mortality statistics. National Center for Health Statistics.
Computer edits for mortality data.
Bureau of Census. Armitage P, Berry G. Statistical methods in medical research. Kleinbaum DG, Kupper LL, Muller KE, editors. Applied regression analysis and other multivariable methods. PWS-KENT Publishing Company, 1988.