DIN EN 1051-2:2007-12 Glass in building - Glass blocks and glass pavers - Part 2: Evaluation of conformity/Product standard; German version EN 1051-2:2007
2007DIN EN 1051-2:2007-12 Glass in building - Glass blocks and glass pavers - Part 2: Evaluation of conformity/Product standard; German version EN 1051-2:2007
2007DIN EN 1051-2:2007 Glass in building - Glass blocks and glass pavers - Part 2: Evaluation of conformity/Product standard; English version of DIN EN 1051-2:2007-12