DIN 18338:2019-09 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Roofing works
2019DIN 18338:2019-09 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Roofing works
2012DIN 18338:2012 German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Roofing work
0000 DIN 18338:2010
2006DIN 18338:2006 German construction contract procedures - Part C: General technical specifications for building works - Roof covering and roof sealing works