2014DIN EN 12326-1:2014-11 Slate and stone for discontinuous roofing and external cladding - Part 1: Specifications for slate and carbonate slate; German version EN 12326-1:2014
2014DIN EN 12326-1:2014 Slate and stone for discontinuous roofing and external cladding - Part 1: Specifications for slate and carbonate slate; German version EN 12326-1:2014
2004DIN EN 12326-1:2004 Slate and stone products for discontinuous roofing and cladding - Part 1: Product specification; German version EN 12326-1:2004