00253nam a2200097Ia 4500008004100000040002500041082001200066245002800078260004100106300000800147230627s9999    xx            000 0 und d  aNORSU-SiacNORSU-Sia  a507 Sa3 4aThe teaching of science  bPHOENIX PUBLISHING HOUSE, INC.c1985  a208