00437nam a22001457i 4500001001000000005001700010008004100027082002200068100001600090245005500106260006700161300001700228650002800245020001800273SXC02919320260819093839.0260101s2007    ii            000 0 eng d  a540.157 BAL-T222  aBalram Pani10aTextbook of environmental chemistry /cBalram Pani  abI K International Publishing House Pvt.Ltd, New Delhi,c2007  ap. ;c22 cm. 0aEnvironmental chemistry  a9788189866365