00317nam a2200109Ia 4500008004100000020001800041082001500059100002100074245007100095260002800166300001300194190710s9999    xx            000 0 und d  a0-415-23763-7  a372.35 W15  aWallace, John ed 0aDilemmas of science teaching : perspectives on problem of practice  aLondonbRoutledgec2002  avii, 258