00599nam a22001937a 4500 158231 158231 20181022165545.0 A-945455 8171414249 A-945455 Discovery publishing house 372.7 Prabhakaram, K. S. Concept attainment model in mathematical teaching/ by K. S. Prabhakaram New Delhi Discovery publishing house 1998 101 p. 22cm (HB) Rao, Digumarti Bhaskara ddc EN 372.7 PRA 0 0 0 0 NFIC ZLS ZLS 2018-10-22 0 372.7 PRA A-945455 2018-10-22 00:00:00 2018-10-22 EN