00346nam a2200121 a 450000500170000008200190001710000210003624500510005726000360010830000230014449000380016770000190020520251203091010.0  a512.7,bD, ire  aIreland, Kenneth  aClassical introduction to modern number theory  aNew YorkbSpringer-Verlagc1982  axiii, 341p6c22 cm.  aGraduate texts in mathematicsd84  aRosen, Michael