2020DIN EN ISO 12956:2020-05 Geotextiles and geotextile-related products - Determination of the characteristic opening size (ISO 12956:2019); German version EN ISO 12956:2020
2020DIN EN ISO 12956:2020 Geotextiles and geotextile-related products - Determination of the characteristic opening size (ISO 12956:2019)
2010DIN EN ISO 12956:2010 Geotextiles and geotextile-related products - Determination of the characteristic opening size (ISO 12956:2010); German version EN ISO 12956:2010