Geotechnical investigation and testing - Sampling methods and groundwater measurements - Part 1: Technical principles for execution (ISO 22475-1:2006); German version EN ISO 22475-1:2006— 127 стр.
Geotechnical investigation and testing - Geotechnical monitoring by field instrumentation - Part 2: Measurement of displacements along a line: Extensometers (ISO 18674-2:2016); German version EN ISO 18674-2:2016— 55 стр.
Geotechnical investigation and testing - Geotechnical monitoring by field instrumentation - Part 2: Measurement of displacements along a line: Extensometers (ISO 18674-2:2016); German version EN ISO 18674-2:2016— 55 стр.
German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Borehole sinking operations— 16 стр.