00300nam a2200121Ia 450000500170000000800410001704100080005808200130006610000190007924500230009826000480012130000090016920260720174555.0260720s2006    xx            000 0 und d  aeng  a500 EDIS  aEdiger, Marlow  aScience curriculum  aNew DelhibDiscovery Publishing Housec2006  a301p