00297nam a2200097Ia 4500008004100000100004400041245006200085260002900147300000900176650001400185190216s9999||||xx |||||||||||||| ||und||  a"Chhatwal G R, Mehra M C&Amp; Katyal T" 0aEnvironmental Land And Marine Pollution And Their Control  bAnmol Publicationsc1989  a335p  aChemistry