00318nam a2200133Ia 450000500170000000800410001704100080005808200150006610000170008124500220009826000400012030000090016065000150016920250729165333.0250729s2005    xx            000 0 und d  aeng  a371.4 VENT  aVenkataiah S  aScience Education  aNew DelhibAnnual Publicationc2005  a274p  aTechnology