00298nam a2200121Ia 450000500170000000800410001704100080005808200130006610000230007924500220010226000430012430000090016720260720174757.0260720s2011    xx            000 0 und d  aeng  a500 KRIS  aKishnamacharyalu V  aScience education  aNew DelhibNeelkamal Publicationc2011  a356p