00278nam a2200109 a 450000500170000002000150001708200150003210000190004724500340006626000470010030000210014720251203111211.0  a0821828339  a512.7bNAG  aNagell, Trygve  aIntroduction to Number Theory  aRhode IslandbAMS chelsea publishingc1964  a309p.c23cm.cHB