00397nam a2200145Ia 4500008004100000082001100041100002300052245004800075250001200123260003900135300000900174600002200183600002200205650002400227140113s9999    xx            000 0 und d  a574 K2  a"Needham, James G"  aA guide to the study of fresh-water biology  a5th Ed.  b"San Francisco : Holden-day, 1962"  a108p  a"Needham, Paul R"  a"Needham, Paul R"  aFresh water biology