DIN CEN/TS 15209
DIN CEN/TS 15209 Tactile paving surface indicators produced from concrete, clay and stone; German version CEN/TS 15209:2008
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 08/01/2008
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 08/01/2008