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2. Ethnic differences in the incidence of malformations following Knox EG, migration;Leck, I.;Br J Lancashire RJ. Prev Soc Med
3. Analysis of perinatal mortality by ethnic due to group: does consanguinity congenital malformations? contribute to;Dunlop, L.S.; Winter, R.M.;J Med Genet mortality,1987
4. Perinatal mortality in different ethnic groups;Chitty, R.S.; Wmter, R.M.;Arch Dis Child,1989
5. Mortality from congenital malformations in England and Wales: variations by mother's country of birth;Balarajan, R.; Raleigh, V.S.; Botting, B.;Arch Dis Child,1989