(3GdETcGdGJ ai JfajP GdCMcGe GdLfGFjI(B:s (3OQGSI ebGQfI ai GdbGfhf GdeUQj hGdaQfSj (B/s - (3eMehO cHjTs ((3GdbGgQI (B:s (3OGQ GdacQ GdYQHj (B,s, 1990)
(3GdfU HGddZI GdYQHjIs
Keywords: (3bGfhf LfGFjs; (3GdETcGd aj JfajP GdCMcGe GdLfGFjIs