000 00303nam a22001577a 4500
022 _a-
082 _a510
_bPOT
100 _apotter
245 _aMathematics to use
_b-
_cpotter
250 _a1950
260 _aLondon
_bLondon
_c1950
300 _a501
_e-
500 _a-
700 _a-
942 _cBK
999 _c15828
_d15828