00353nam a2200133Ia 4500008004100000020001800041082001100059082001000070100001400080245006500094260002500159260002600184260000900210230118s9999||||xx |||||||||||||| ||und||  a81-219-0883-3  a540.15  bDAR/A  as.sbdara 2aa text book of envirormental chemistry and pollution control  aRAM NAGAR ,NEW DELHI  bS.CHAND &COMPANY LTD   c1993