00277nam a22000977a 4500008004100000020001500041050001300056100001700069245005300086260004000139131224b        xxu||||| |||| 00| 0 eng d  a8174886486  a363.7006  aChhatwal G R  aEncyclopaedia of environmental management, Vol.1  aNew DelhibAnmol publicationsc1998