00456nam a2200145Ia 450000500170000000800410001704100080005808200160006610000230008224500360010526000380014130000090017999900190018895201030020720260720174536.0260720s2005    xx            000 0 und d  aeng  a370.78 GUPR  aGupta, S P9267879  aResearch in teaching of science  aNew DelhibA P H Publishingc2005  a260p  c241957d241957  001040708BEDaALbALd2026-07-20l0o370.78 GUPRpBED00349r2026-07-20 17:45:36w2026-07-20yBK