(3GdehShYI GdbVGFjI GdYScQjI(B/s - (3YGeQ,aDGO GMeOs ((3GdbGgQI(B[(3eUQ(B]:s (3OGQ GdKbGaI ddWHGYI hGdfTQ,s, 1987)
(3jJVef bVGA OSJhQj(B-(3bVGA LfGFj LfGFj(B-(3bVGA GOGQj(B-(3bVGA eGdjs
Keywords: (3GdbVGA GdYScQjs