00416nam a2200133Ia 4500082002000000100001800020245004900038260004800087300002700135490005400162500005600216500000500272700000500277  a515.72bD255.ST  aDavies, E. B.  aSpectral theory and differential operatorsb  aCambridgebCambridge University Pressc1995  aix, 182p. Index, Bibl.  aCambridge studies in Advanced Mathematicsv v. 42  a"Purchased under NBHM grant for the year 1994-1995"  a  a