00267nam a2200109Ia 4500008004100000040002500041082001600066100001900082245003900101260000900140300000800149230627s9999 xx 000 0 und d aNORSU-SiacNORSU-Sia a647.94 R674 a3G E- Learning 0aRooms Division Management with DVD c2017 a228