00296nam a2200121Ia 4500082002000000100001600020245002000036260004800056300001900104490004100123500000500164700000500169  a515.35bL793.DT  aLloyd N. G.  aDegree theoryb  aCambridgebCambridge University Pressc1978  ax, 172p. Index  aCambridge tracts in Mathematicsv 73  a  a