00270nam a2200109Ia 4500008004100000040002500041082002100066100001900087245003700106260000900143300000800152230627s9999    xx            000 0 und d  aNORSU-SiacNORSU-Sia  a647.940682 H8169  a3G E- Learning 0aHousekeeping Operations with DVD  c2017  a264