00314nam a2200121Ia 450000500170000000800410001702000180005808200200007610000200009624500260011626000370014230000130017920241210150845.0231221s9999    xx            000 0 und d  a9780125184069  a005.1  NIE;1  R  aNielsen, Jakob. 0aUsability engineering  c1993bMorgan KauffmanaAmsterdam  axiv, 362