German standard methods for the examination of water, waste water and sludge; bio-assays (group L); determining the tolerance of fish to the toxicity of waste water by way of a dilution series (L 31)
German title
Deutsche Einheitsverfahren zur Wasser-, Abwasser- und Schlammuntersuchung; Testverfahren mit Wasserorganismen (Gruppe L); Bestimmung der nicht akut giftigen Wirkung von Abwasser gegenüber Fischen über Verdünnungsstufen (L 31)
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