Subsoil and groundwater; classification and description of soil and rock; borehole logging of soil and rock not involving continuous core sample recovery— 20 стр.
German construction contract procedures - Part C: General technical specifications for building works - General rules for all kinds of building works— 15 стр.
German construction contract procedures - Part C: General technical specifications for building works - Works for pressure pipe lines in the ground— 9 стр.