000 00484nam a2200169Ia 4500
008 230524s9999 xx 000 0 und d
040 _cUDSM
050 _aMATH QA11.H4
100 1 0 _aHeritage, Raymond S.
_eAuthor
245 1 0 _aLearning mathematics book1
_cRaymond S. Heritage
260 _aHarmondsworth
_bPenguin Books
_c1971
300 _a288p.
_bill.
_c23cm.
504 _aIncludes index
650 _aMathematics
650 _aStudy and teaching (Elementary)
942 _2lcc
_cBK
999 _c66985
_d66985