Water quality - guidance standard for the routine sampling and pretreatment of benthic diatoms from rivers 水质.河水中底栖硅藻类常规取样和预处理的指导性标准
2.
Water quality - guidance standard for the routine sampling and pretreatment of benthic diatoms from rivers ; german version en 13946 : 2003 水质.河床硅藻类常规取样和预处理的指导性标准