00300nam a2200133Ia 4500008004100000020001800041041000800059082001500067100002100082245003000103250001000133260001500143300000800158211209s2017    xx            000 0 und d  a9781259025761  aeng  a512.72 BUR  aBURTON, DAVID M.  aELEMENTARY NUMBER THEORY   a7 ed.  bMCGHc2017  a452