00533nam a2200157Ia 450000500170000000800460001703700290006304000200009204100130011208400230012524500540014824500270020226000640022930000100029354600720030320250508151459.0008  250505s9999    xx            000 0 eng d  aBooks to be hide in OPAC  aFEDLbengcFEDL  aeng2eng  a510.7, NAT/OqFEDL 0aMulti-sensory aids in the teaching of mathematics 0cBureau of Publications  aNew York, USAbTeachers College, Columbia University c1945  a455p.  aThe National Council of Teachers of Mathematics Eighteenth Yearbook