Waidyanatha, U.P.de.S.2014-06-032014-06-032000 (08 SLankadeepa:p.22https://dl-cri.nsf.gov.lk//handle/1/3701Trade and MarketingMarket competitionPrice fluctuationsProduct diversificationMarket channelsPol welenda pola jayaganna aluth krama soyagannata barida?