000 00336 a2200133 4500
020 _a0335142745
082 _a004.0151
_bOPE
090 _c6056
_d8235
245 _aChapter 5 sets
_bBlock IV (Chapters 4-6)
260 _aWellington
_bOpen University
_c1988
_g1988
300 _a40p.
_c29cm
650 _aMathematical principles
942 _cL
999 _c34852
_d34852