00367nam a2200145Ia 4500008004100000020001800041041000800059082001800067100002000085245004800105250001100153260003100164300001000195650001600205060110s9999    xx            000 0 und d  a9788185392684  aeng  a512.72bBUR/E  aBurton, David M  aElementary number theorycBy David M Burton  a2nd ed  bUniversal Book Stallc1997  a450p.  aMathematics