00489nam a2200157 a 450000500170000000800410001702000150005804100080007308200130008110000160009424500650011026400550017530000300023050000510026065000200031120260717091617.0260717s1997    ii            000 0 eng d  a812241009X  aeng04a363.73941 aGoel, P. K.10aWater pollution : causes, effects and control /cGoel, P. K. 1aNew Delhi :bNew Age Internatinal (p) Ltd.,c1997.  ax, 269 p. : ill. ; 23 cm.  aIncludes Bibliographical References and Index. 4aWater Pollution