00337nam a2200133Ia 4500003000400000008004100004020002300045040000800068100002200076245005100098260002800149300001400177365001200191LDD181029s9999    xx            000 0 und d  a415396352cP 22.99  cLDD  aJan Van Den Akker 0aEducational design researchcJan Van Den Akker  aLondonbRoutledgec2006  axi, 163p.  bP 22.99