00474nam a2200145Ia 4500 20240821151646.0 240821s9999||||xx |||||||||||||| ||und|| 372.7 ENR Surja Kumari Enrichment training course for resource persons in mathematics at upper primary level (held on November 11-15, 1991) New Delhi Deptt of Edu. in Sc and Math., NCERT 1991 203+5p Elementary education BK 38294 38294