Balasuriya, S.2012-01-102012-01-101990The Ceylon Journal of Medical Science33(1)pp.27-31https://dl.nsf.gov.lk/handle/1/7110Medical SciencesMenarchael ageGeographic variationSecular trendNutritional statusIodine deficiencyHealth scienceMean age at menarche in 17 districts of Sri Lanka. is there a secular trend?Article