00561nam a2200145Ia 4500008004100000040001700041082002000058110008800078245006700166260002400233300001000257440002400267500006800291650005600359190328s9999||||xx |||||||||||||| ||und||  aNITILcNITIL  221sta373bU58T  aUnited Nations Educational, Scientific and Cultural Oraganization(29th:1956:Geneva) 0aTeaching of mathematics in secondary schoolbcomparative study  aParisbUNESCOc1956  a249p.  aPublication; no.172  aXIXth International Conference on public education, Geneva 1956  aEducation,Secondary; Mathematics-Study and teaching