00281pam a2200121 a 4500020000500000041000800005082001500013100001800028245004800046260004100094300001200135653001200147  c  aeng  a512.7bDAV  aDavid Burton.  aElementary Number TheoryhTextual Documents  aNew Delhi:bTata McGraw Hill,c2008.  a434 pg.  aAlgebra