00338nam a2200109Ia 4500003000400000008004100004040000800045111004500053245005800098260005900156300001300215LDD181029s9999    xx            000 0 und d  cLDD  aSeminar on water quality and its managem 0aProceedingscSeminar on water quality and its managem  aNew DelhibCentral Board of Irrigation and Powerc1986  aiv, 40p.