DIN 60500-8
DIN 60500-8 Geotextiles and geotextile related products - Part 8: Determination of the coefficient of water permeability with radial flow in the plane
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2007
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 12/01/2007