00312nam a2200121Ia 4500082001900000100001600019245006200035260003400097300001000131490003900141500000500180700000500185  a512.7bM235.DU  aMaki, Sirpa  aThe determination of units in real cyclic sextic fieldsb  aBerlinbSpringer-Verlagc1980  a198p.  aLecture notes in Mathematicsv 797  a  a