Bauarbeiten - Dacheindeckung aus Schiefer - Teil 1-1 : Technische Vorschriften - Teil 1-2 : Allgemeine Kriterien der Wahl der Materialien - Part 2: contract bill of special administrative model clauses
Englischer Titel
Building works - Roof covering made of natural slates - Part 1-1 : contract bill of technical model clauses - Part 1-2 : general criteria for selection of materials - Part 2: contract bill of special administrative model clauses