00489nam a2200133Ia 450000500170000000800460001703700290006304000210009204100130011308400240012624501270015026000680027730000100034520250508151916.0008  250505s9999    xx            000 0 eng d  aBooks to be hide in OPAC  aFEDL bengcFEDL  aeng2eng  a370.58, NAT/OqFEDL 0aTwenty-ninth yearbook of the national society for the study of education : Report of the society's committee on arithmetic  aBloomingtonbBloomington Public School Publishing Companyc1930  a743p.