Amarasekera, J.Ismail, M.G.M.U.2010-07-062010-07-061983Journal of the National Science Council of Sri Lanka, 11(2):p.211-224https://dl.nsf.gov.lk/handle/1/6282PhosphateCalcinationImpuritiesSilica sandsGeologyPreliminary laboratory studies on Eppawala apatite - IIArticle