Javed, M.Irfan, M.Bhatti, S.H.2022-01-052022-01-052020-09Journal of the National Science Foundation of Sri Lanka,49(2):p.281-294https://dl.nsf.gov.lk/handle/1/25464Auxiliary informationNon-sampling errorsPercent relative efficiencyStratified random samplingOn optimal classes of estimators in the presence of some non sampling errorsArticle