DIN 67523-1 E:2009-05 Lighting of pedestrian crossings (sign 293 StVO) with additional lighting - Part 1: General quality characteristics and guide values
2010DIN 67523-1:2010-06 Lighting of pedestrian crossings (sign 293 StVO) with additional lighting - Part 1: General quality characteristics and guide values
2010DIN 67523-1:2010 Lighting of pedestrian crossings (sign 293 StVO) with additional lighting - Part 1: General quality characteristics and guide values
1988DIN 67523-1:1988 Lighting of pedestrian crossings (sign 293 StVO) with additional lighting; general quality characteristics and guide values