000 003170000a22001330004500
008 140223b1956 xxu||||| |||| 00| 0 eng d
041 _aENG
080 _aB321 J6
082 _aB321 J6
100 _aFERRAR (W L)
245 _aDifferential calculus.
260 _aOxford
_bClarendon
_c1956
650 _aDIFFERENTIAL
999 _c253486
_d253486