Gunatilake, H.M.Vieth, G.R.2010-07-062010-07-061998Sri Lanka Journal of Social Sciences, 21(1 and 2):p.37-57https://dl.nsf.gov.lk/handle/1/5065Wildlife conservationPinnawala orphangeRecreational valueEconomic analysisTravel cost modelEconomicsAn assessment of scenic value of Sri Lankan elephants:the case of Pinnawela orphangeArticle