00267nam a2200109Ia 4500008004100000040002500041082001300066100002500079245003600104260000900140300000800149230627s9999    xx            000 0 und d  aNORSU-SiacNORSU-Sia  a510 C154  aCalingasan, Recto M. 0aMathematics in the Modern World  c2018  a356