00442nam a2200145Ia 450000500170000000800410001704100080005808200130006610000260007924500420010526000210014730000090016899900190017795201000019620260720174718.0260720s1963    xx            000 0 und d  aeng  a513 MORM  aMorton Robert9270643  aModern arithmetic through discovery-5  aNew Jerseyc1963  a344p  c244845d244845  001040708BEDaALbALd2026-07-20l0o513 MORMpBED03237r2026-07-20 17:47:18w2026-07-20yBK