00270nam a2200097Ia 4500008004100000082001500041100001700056245004100073260004700114300001100161190709s9999    xx            000 0 und d  a136.7 P571  aPiaget, Jean 0aJudgement and reasoning in the child  aNew JerseybLittlefield, Adams and Cc1959  avi,260