Water quality surveys :

                                                                                                                
543.3WAT
   Water quality surveys : a guide for the collection and interpretation of water quality data / .- Paris:Unesco ,1978.
  350p. :ill.;23cm(Hb)
  Note: Includes bibliographical reference
  ISBN:9231014730     Rs. 00.00

  Cen Lib/Ret /920062/ 920062 /   0.00 /sign

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