000 00336 a2200133 4500
020 _a0335142818
082 _a004.0151
_bOPE
090 _c6048
_d8227
245 _aChapter 12 proof
_bBlock IV (Chapters 10-13)
260 _aWalton
_bOpen University
_c1995
_g1995
300 _a52p.
_c29cm
650 _aMathematical principles
942 _cL
999 _c34845
_d34845