DIN EN ISO 1833-18:2011 纺织品.定量化学分析.第18部分:丝绸和羊毛或头发的混合物(硫酸法)(ISO 1833-18-2006);德文版本EN ISO 1833-18-2010
Textiles - Quantitative chemical analysis - Part 18: Mixtures of silk and wool or hair (method using sulfuric acid) (ISO 1833-18:2006); German version EN ISO 1833-18:2010