Dissanayake, C.B.Rupasinghe, M.S.2015-06-032015-06-031986Journal of the National Science Council Sri Lanka, 14(1):p.55-74https://dl-ifs.nsf.gov.lk/handle/1/315Geology and Earth SciencesThe niobium and yttrium abundances in the sedimentary gem deposits of Sri LankaArticle