00313    a2200109   4500020001500000082001500015100002100030245005700051260006100108300001800169650001600187  a9559017071  a333.7bRAT  aRathnadeera, W.K  aAn economic valuation of the coral reef at hikkaduwa  aColombobThe Department of National Planningc2002g2002  aix,21p.c29cm  aEnvironment