Soil quality – Field tests – Part 8: Determination of the hydraulic conductivity by auger hole method
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2012

Soil quality – Field tests – Part 8: Determination of the hydraulic conductivity by auger hole method
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 07/01/2007