00287nam a2200121Ia 450000500170000000800410001704100080005808200150006610000130008124500240009426000380011830000090015620260720174553.0260720s2004    xx            000 0 und d  aeng  a500.7 RAOS  aRao, V K  aSecondary education  aNew DelhibA P H Publishingc2004  a307p