00510nam a2200205Ia 4500008004100000040000600041041001200047082001200059082001100071100001700082245004400099245001700143260001400160260002300174260000900197300005500206300001000261365000800271501002500279141004s9999    xx            000 0 und d  ca  aEnglish  a344.046  bMAL/EN  aRA   Malviya  aEnvironmental pollution and its control  cRA   Malviya  aAllahabad  bChugh publications  c1987  a488 p.                                              b22 cm  a325  a3A4