00309nam a2200109 a 450000500170000002000150001708200200003210000320005224500610008426000390014530000150018420251203091653.0  a8170871505  a632.58,bD, abb  aAbbasi, S.A., Nipaney, P.C.  aWorld's worst weed: Salvinia: its impact and utilization  aDehradunbInternational bookc1993  a228p, 22cm