1. Annual Health 2nd ed. Bulletin, Ministry of Health, Sri Lanka 1991
2. Pregnant women at work;Chamberlain;Lancet,1983
3. Foetal death in women at work: an eveluation of survey methods;Kashiwazaki;Proceedings of the 10th Asian Conference on Occupational Health,1982
4. Prematurity and work in pregnancy;McDonald;Br J Industr Med,1988
5. Employment in pregnancy: prevalence, maternal charactristics, perinatal outcome;Murphy;Lancet,1984