00289nam a2200097Ia 4500008004100000082001500041100002200056245005800078260004400136300001100180190709s9999    xx            000 0 und d  a154.4 B72C  aBraun, John R Ed. 0aContemporary research in learning : selected readings  aPrincetonbD Van Nostrand Companyc1963  avi,229