000 00354 a2200145 4500
020 _a0335142338
082 _a515.33
_bOPE
090 _c8866
_d12292
100 _aThe Open University
245 _aUnit 1
_b differentiation
260 _aKeynes
_bThe Open University
_c1987
_g1987
300 _a56p.
_c29cm
650 _aDifferential calculus
942 _cL
999 _c37500
_d37500