00322nam a2200121Ia 450000500170000000800410001702000220005804000100008005000160009010000210010624500450012765000280017220251229183933.0251229s9999    xx            000 0 und d  a978-0-07-074334-2  cEULIB  aLB 1134.D3   aDavis, Robert H. 0aLEARNING  SYSTEM DESIGN.cRobert H Davis  aLearning, Psychology Of