00449nam a22001577i 4500001001000000005001700010008004100027082002700068100002500095245005200120250001000172260004600182300001700228650002800245020001800273SXC02156120260819093713.0260101s1997    ii            000 0 eng d  aCHE 540.157 SHA-E4222  aSharma, B K; Kaur, H10aEnvironmental chemistry /cSharma, B K; Kaur, H  a4 ed.  abKrishna Prakashan Mandir, Meerut,c1997  ap. ;c22 cm. 0aEnvironmental chemistry  a9780024152626