German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Borehole sinking operations— 14 стр.
Tendering and performance stipulations in contracts for construction works (VOB); part C: general technical specifications in contracts for construction works (ATV); well sinking— 10 стр.
German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Borehole sinking operations— 12 стр.
Drinking water supply from small units and non stationary plants - Part 1: Small units - Guidelines for drinking water, planning, construction, operation and maintenance of plants; Technical rule of the DVGW— 32 стр.