00288nam a2200121Ia 450000500170000000800410001704100080005808200150006610000130008124500250009426000380011930000090015720260720174553.0260720s2004    xx            000 0 und d  aeng  a371.4 RAOV  aRao, V K  aVocational education  aNew DelhibA P H Publishingc2004  a400p