(3GdThQi aj GdbQBf hGdSfI (B: s (3OQGSI ehVhYjI hJMdjdjI (B/ s - (3aQL, HSGe YWjI ESeGYjds ((3YeGf (B:s (3OGQ GdHTjQ,s, 1996)
Keywords: (3GdCMcGe GdSdWGfjIs; (3GdThQis; (3GdOjebQGWjIs