1. American Association for the Advancement of Science, and D. Gergsma (1972 ), Advances in Human Genetics and Their Impact on Society . Birth Defects: Original Article Series Vol. VIII No. 4. U.S.A. National Foundation - March of Dimes.
2. Australian Bureau of Statistics (1975 ), Causes of Death, Australia, 1973. Bull. No. 10. Canberra, Commonwealth Statistician. Table 6, p.69 .
3. Australian Bureau of Statistics (Q'ld Office) (1978 ), Cause of Death. Queensland, 1976. Ref. No. 3302.3. Brisbane, Australia. Deputy Commonwealth Statistician. Table 1. Deaths of Males and Females by Cause and Age. Group M2-28.
4. J. Bell Director, Cytogenetics Laboratory, State Health Department, Queensland (personal communication).