00553nam a2200181 a 450000500170000002000150001708200150003210000220004724500270006926000390009630000210013549000650015669000230022196400220024499700190026699900170028595200690030220251203110425.0  a812611102X  a577.6bFRE  aMishra, Ravi ed.,  aFreshwater environment  aNew DelhibAnmol Publicationc2002  a226p.c22cm.bHB  aEncyclopedia of geographical science and environment science  aFreshwater ecology  bcENGde574fg_  a107015 LIBSC C  c89481d89481  00104070aPUbPUd2004-01-14g637.50l0o577.6 FREp107015yBK