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667416 
Technical Report 
Standard 
German standard methods for the examination of water, waste water and sludge; bio-assays (group L); determining the tolerance of Daphnia to the toxicity of waste water by way of a dilution series (L 30) 
Deutsches Institut fur Normung :: DIN 
1989 
Beuth Verlag GmbH 
Berlin, Germany 
Abwasser; Einheitsverfahren; Pruefung 
38412-30