2010NF G38-140:2010 Geotextiles and geotextile-related products - Determination of water permeability characteristics normal to the plane, without load.
1999NF G38-140:1999 Geotextiles and geotextile-related products. Determination of water permeability characteristics normal to the plane, without load.
1989NF G38-016:1989 TEXTILES. ARTILCES FOR INDUSTRIAL USES. TESTS FOR GEOTEXTILES. MEASUREMENT OF WATER PERMEABILITY.