DIN EN ISO 23611-1-2011 土质.土壤无脊椎动物的取样.第1部分:蚯蚓的手工排检和甲醛液提取(ISO 23611-1-2006);德文版本EN ISO 23611-1-2011
Soil quality - Sampling of soil invertebrates - Part 1: Hand-sorting and formalin extraction of earthworms (ISO 23611-1:2006); German version EN ISO 23611-1:2011