00346nam a2200133Ia 4500008004100000041000800041082001400049100001700063245003400080250001200114260005600126300000800182650002200190230711s9999||||xx |||||||||||||| ||und||  aENG  a720bHY-E  aHynes, H.B.N 4aThe ecology of running waters  a1st Ed.  c1970aCambridge StreetbLiverpool University Press.  a555  aCivil Engineering