000			00352nam a2200145Ia 4500
008			180613s9999||||xx |||||||||||||| ||und||
020			_a198533708
041			_aen
082			_a515.7222
100			_aEDMUNDS, D.E
245		0	_aSpectral theory and differential op
260			_aOxford. _bClerendon Press _c1990
300			_axviii, 574
942			_cSR
999			_c81688 _d81688