00330nam a2200145Ia 450000100060000000800410000602000180004704000130006508200180007810000190009624500420011526000090015730000110016654600070017710356140328s9999    xx            000 0 und d  a0-12-518405-0  cPK-LaUMT  a 005.1bNIE-U  aNielsen, Jakob  aUsability engineeringcNielsen, Jakob  c1993  a358 p.  aEN