000			00266nam a2200097 4500
245			_aPartial differential equations _cby E.T.Copson
100			_aCopson, E.T.
260			_aCambridge _bAt the University Press _c1975.
300			_avii,280p.; 24cm.
082			_a515.353 _bCOP
999			_c34419 _d34419