2020DIN EN ISO 14688-1:2020-11 Geotechnical investigation and testing Identification and classification of soil Part 1: Identification and description (ISO 14688-1:2017); German version EN ISO 14688-1:2018
2018DIN EN ISO 14688-1:2018 Geotechnical exploration and investigation – Naming, description and classification of soil – Part 1: Naming and description (ISO 14688-1:2017); German version EN ISO 14688-1:2018