00289nam a2200121Ia 450000500170000000800410001704100080005808200130006610000150007924500220009426000420011630000090015820260720174647.0260720s2006    xx            000 0 und d  aeng  a370 SINP  aSingh, U K  aPrimary education  aNew DelhibDiscovery Publishersc2006  a306p