00357nam a2200133Ia 4500008004100000020001800041082001200059082001000071100001700081245006500098260002500163260002600188260000900214230118s9999||||xx |||||||||||||| ||und||  a81-219-0883-3  a574.192  bDAR/A  aDR.SS.bDARA 2aa text book of envirormental chemistry and pollution control  aRAM NAGAR ,NEW DELHI  bS.CHAND &COMPANY LTD   c1993