00365nam a2200145Ia 4500008004100000020001500041082002000056100001600076245002300092260003700115300000800152650001800160650001800178653002300196170901s1974    xx            000 0 und d  a0582446244  a574.52632bM12F  aMacan, T.T. 0aFreshwater Ecology  aLondonbLongman Group Ltd.c1974  a343  aLife sciences  aPure Sciences  aFreshwater ecology