(3cJGH GdGQHYjf ai efGbH GegGJ GdeDefjf (B/ s - (3GHi efUhQ YHOGdQMef Hf YSGcQs; (3eMeO GMeO YHOGdYRjRs ([S.N] : (3ecJHI GdJQGK GdGSdGei , s, 1990)
Keywords: (3GdMOjKs; (3GdGQHYhf MOjKGs