00294nam a2200109Ia 4500008004100000082002300041100001300064245004700077250000900124260004300133300000800176240913s9999||||xx |||||||||||||| ||und||  aGS    581.7  RAJ/E  aR A Raju 0aEcology of aquatic weeds and their control  aNULL  bSultan Chand and SonsaNew DelhicNULL  a159