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040 _aMAIN
041 _aEnglish
082 _a510
_bHOW
100 _aHowson, A. G., Moore, H. N. R.
245 4 _aThe school mathematics projects
_bteacher's guide for book 3
260 _a1967
_bCambridge University Press
_cCambridge
300 _a263p.
650 _aMathematics
942 _cBK
999 _c41502
_d41502