(3GdbQjI GdeUQjI(B: (3OQGSGJ GLJeGYjI ai GdJfejI hGdJZjQ (B/ s - (3LdGd eOHhdis ([S.N] : (3ecJHI fgVI GdTQb , s, 1980)
Keywords: (3GdYdes; (3GdGLJeGYs; (3GdJfejIs; (3GdJZjQ GdGLJeGYis; (3GdJfejI GdQjajIs; (3GdbQis