Subsoil and groundwater; classification and description of soil and rock; borehole logging of soil and rock not involving continuous core sample recovery— 20 стр.
Tendering and performance stipulations in contracts for construction works (VOB); part C: general technical specifications in contracts for construction works (ATV); earthworks— 14 стр.
Contract procedures for building works - Part C: General technical specifications for building works; Construction works for traffic lines, top layers without binders— 11 стр.
Geotechnical investigation and testing - Identification and classification of soil - Part 2: Principles for a classification (ISO 14688-2:2004); German version EN ISO 14688-2:2004— 16 стр.