DIN 38412-31-1989
德国检验水、废水和污泥的标准方法.水有机物试验方法.生物测定(L组):采用(L 31)稀释法测定鱼类对污水毒性的耐受度
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)