000 00283nam a22001217a 4500
999 _c1809
_d1809
020 _a0719544548
082 _a510
_bWAR
100 _aWarren.T
245 _aSteps in Understanding Mathematics
_cWarren.T
260 _aLondon
_bJonh Murry Publishers
_c1991
300 _a218p.
942 _cL