German standard methods for the examination of water, waste water and sludge; sludge and sediments (group S); determination of the specific residual beta activity in sludge, sediment and suspended matter (S 15)
德国水、废水和污泥检验标准方法;污泥和沉积物(S组);污泥、沉积物和悬浮物中比残留β活性的测定(S 15)