00331nam a2200109Ia 4500008004100000082001000041082000800051245013700059245000800196260000800204300000900212231017s9999    xx            000 0 und d  a624.1  bBSI 0a"Stairs, Ladders and Walkways - Part1: Code of Practice for the Design, Construction and Maintenance of Straight Stairs and Winders" 0cBSI  bBSI  c30cm