German standard methods for the examination of water, waste water and sludge; bio-assays (group L); determination of the effect of substances in water on fish, fish-test (L15)— 8 стр.
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)— 9 стр.
