DIN 38402-6:1991
德国检验水、废水和污泥的标准方法.一般信息(A组).对排放物中水成份控制评定的最低频次(排放策略)
German standard methods for the examination of water, waste water and sludge; general information (group A); assessment of the minimum frequency for controlling water constituents in discharges (emission strategy) (A 6)