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Item Migration of Sri Lankan workers to the Middle East:a sociological viewpoint(Natural Resources Energy Science Authority of Sri Lanka:Colombo, 1988) Hettige, S.T.Item Environment and sustainable development-some sociological issues(NARESA:Colombo, 1993) Hettige, S.T.Item Introduction globalisation and its impact on Sri Lanka(National Science Foundation:Colombo, 20022003) Hettige, S.T.Item Migration to the Middle East, social stratification and social mobility:case studies from Sri Lanka(Natural Resources, Energy Science Authority:Colombo, 1989) Hettige, S.T.Item Upper and lower circuits in the context of urban-rural exchange relations(Natural Resources Energy Science Authority of Sri Lanka:Colombo, 1990) Hettige, S.T.