00288nam a2200109Ia 4500008004100000020001800041082001400059100001700073245003400090260004300124300001100167190710s9999    xx            000 0 und d  a0-486-65620-9  a512.810 9  aOre, Oystein 0aNumber theory and its history  aNew YorkbDover Publications Incc1976  ax, 370