000 00345 a2200133 4500
020 _a0335142788
082 _a004.0151
_bOPE
090 _c6063
_d8243
245 _aChapter 9 n-ary relations
_bBlock IV (Chapters 10-13)
260 _aWalton
_bOpen University
_c1988
_g1988
300 _a59p.
_c29cm
650 _aMathematical principles
942 _cL
999 _c34859
_d34859