Dahanayake, KSilva, K.K.M.W.Subasinghe, S.M.N.D.2016-07-052016-07-051987UNESCO/IUGS International Geological Correlation Programme Project 236 Precambrian Events in the Gondwana Fragments:p.22https://dl-ifs.nsf.gov.lk/handle/1/1761Apatite occurrences in the Sri Lankan precambrianA