000			00371nam a2200145Ia 4500
008			180613s9999||||xx |||||||||||||| ||und||
020			_a521472504
041			_aen
082			_a515.7242
100			_aDAVIES, E.B.
245		0	_aSpectral theory and differential operators
260			_aAmerica _bCambridge University press. _c1995
300			_aix, 182 p.
942			_cSR
999			_c81690 _d81690