Guanawardane, R.P.2010-07-062010-07-061982Journal of the National Science Council of Sri Lanka, 10(2):p.181-194https://dl.nsf.gov.lk/handle/1/5859Eppawala apatitePhosphorus fertilizersRock phosphateGeologySome studies on the reaction of apatite with soda ash and quartzArticle