00345nam a2200121 a 450000500170000008200160001710000170003324500480005026000260009830000270012449000440015163000280019520251202164142.0  a512.74bHEC  aHecke, Erich  aLectures on the theory of algebraic numbers  aSpringer-Verlagc1981  axii, 238p, 22 cm..bPB  aGraduate text series in mathematicsd77  aAlgebraic number theory