DIN EN ISO 14688-2-2013 土工学调查和试验.土壤的识别和分类.第2部分:分类原则(ISO 14688-2-2004+Amd 1-2013).德文版本EN ISO 14688-2-2004+A1-2013
Geotechnical investigation and testing - Identification and classification of soil - Part 2: Principles for a classification (ISO 14688-2:2004 + Amd 1:2013); German version EN ISO 14688-2:2004 + A1:2013