000			00344nam a2200145Ia 4500
008			180611s9999||||xx |||||||||||||| ||und||
020			_a198596332
041			_aen
082			_a515.35
100			_aWILLIAMS, W. E.
245		0	_aPartial Differntial Equations
260			_aOxford _bClarendon Press, _c1980
300			_axi, 354p.
942			_cLL
999			_c9059 _d9059