00490 a2200145 4500 955901708x 628.16837 HEA 18432 28560 Hearath, H.M.B.S. An economic approach to manage industrial water pollution case of kelani river basin in Sri Lanka Colombo The Dep: of National Planinig Ministry of Policy Development and Implementation 2000 2002 xi,46p. 30cm Water Pollution PR 46282 46282 0 0 0 0 REF MKDL MKDL REF 2009-06-23 0 628.16837HEA 61469 2009-06-23 00:00:00 0.00 2016-10-31 PR