000 00424nam a2200157 a 4500
005 20140412111412.0
008 080228s19uu xx 00 eng d
020 _a0-7534-0158-4
050 _aTR(GS 510.7
_bP27 1990
100 _aPatilla, Peter
245 _aGuide to good Maths :
_bSubtracting /
_cPeter Patilla.
260 _aLondon :
_bKingfisher,
_c1990.
300 _a32p.
650 _aSubtraction
999 _c105712
_d105712