00367nam a2200133Ia 4500003000400000008004100004020002700045040000800072100002300080245007700103260002500180300001500205365001300220LDD181029s9999    xx            000 0 und d  a9781402098260cE134.95  cLDD  aBalacheff, Nicolas 0aTechnology-enhanced learningbPrinciples and productscNicolas Balacheff  as.l.bSpringerc2010  axxv, 323p.  bE 134.95