00333nam a2200109Ia 4500008004000000082001800040100001900058245006500077260004400142300001700186650002000203210210b1984   xxu||||| |||| 00| 0 eng d  a574.5263 TRIC  aTRIVEDY (R K).  aChemical and biological methods for water pollution studies.  aKaradbEnvironmental Publicationsc1984  aiv,215,XXXII  aWater pollution