2019DIN 18304:2019-09 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Piling
2016DIN 18304:2016 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Piling
2015DIN 18304:2015 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Piling
2012DIN 18304:2012 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Piling