000 003440000a22001450004500
008 140223b1959 xxu||||| |||| 00| 0 eng d
041 _aENG
080 _aB333 J9
082 _aB333 J9
100 _aLESSMAN (F)
700 _aLEVY (H)
245 _aFinite difference equations.
260 _aLondon
_bPitman
_c1959
650 _aDIFFERENTIAL
999 _c253855
_d253855