00351nam a2200109Ia 4500008004100000082001800041100001700059245006900076260003800145630002800183650003000211211122s9999||||xx |||||||||||||| ||und||  a540.03bTRI-E  aTrivedi, P R 0aEncyclopedia of Environment, Pollution Planning and Conservation  bA.P.H PublishingaNew Delhic2000  xPost Graduate Reference  aNatural SciencesChemistry