DIN 18301:2023-09 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Drilling works
2023DIN 18301:2023-09 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Drilling works
2019DIN 18301:2019-09 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Drilling works
2016DIN 18301:2016 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Drilling works
2015DIN 18301:2015 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Drilling works
2012DIN 18301:2012 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Drilling works