00333nam a2200133Ia 4500020001500000082001900015100001700034245002900051260002600080300002700106500005600133500000500189700000500194  a048664023X  a512.7bC678.AN  aCohn, Harvey  aAdvanced number theoryb  aNew YorkbDoverc1980  axi, 276p. Bibl. Index.  a"Purchased under NBHM grant for the year 2002-2003"  a  a