00470nam a2200145Ia 4500008004100000020001800041040002500059082003100084082000900115100002500124245009700149250000800246260006200254490000800316240730s9999    xx            000 0 und d  a9789811205828  aNORSU-GuicNORSU-Gui  aCir.510.79/Ger31e/2020/c.1  b5803  aRobert Geretschlager 0aEngaging Young Students in Mathematics through Competitions World Perspectives and Practices  ac.1  aSingaporebWorld Scientific Publishing Co. Pte. Ltdc2020  vc.1