00447nam a2200145Ia 450000500170000000800460001703700290006304000210009204100130011308400230012624500460014924500370019526000540023230000150028620250508155003.0008  250505s9999    xx            000 0 eng d  aBooks to be hide in OPAC  aFEDL bengcFEDL  aeng2eng  a510.7, LON/OqFEDL 0aTeaching mathematics in secondary schools 0cLondon. Education (Ministry of )  aLondon, UKbHer Majesty's Stationery Officec1958  aviii,154p.