00379nam a2200145Ia 4500020001500000082001900015100002000034245004100054260003600095300002300131490003300154500003600187500000500223700000500228  a0387942890  a512.7bG986.UP  aGuy, Richard K.  aUnsolved problems in number theoryb  aNew YorkbSpringer-Verlagc1981  axviii, 161p. Index  aProblem books in Mathematics  a"Lib. also has 2nd edn. (1994)"  a  a