00296nam a2200109Ia 450000500170000000800410001708200120005810000200007024500490009026000390013930000080017820260224040819.0260224s9999||||xx |||||||||||||| ||und||  a581 UPA  aUpadhyay, A.R.  0aAquatic plants for the waste water treatment  aLondon: Paris Pergamon Pressc2004  a181