000			00293nam a22001097a 4500
082			_a510.7 _bNCT.L
245			_aLearning of mathematics : _bIts theory and practice /
260			_aWashington : _bNational council of teachers, _c1953.
300			_a355p. :
650			_aMathematics
942			_cBK
999			_c619826 _d619826