000			003220000a22001330004500
008			140223b1969 xxu||||| |||| 00| 0 eng d
041			_aENG
080			_aB334 K9
082			_aB334 K9
100			_aFRIEDMAN (Avner)
245			_aPartial differential equations.
260			_aNew York _bHolt _c1969
650			_aPARTIAL
999			_c253895 _d253895