(3eHGOF MSGH GdJaGVd hGdJcGed dWdHI GdYdhe hGdQjGVjGJs ((3GdbGgQI (B:s (3GdOGQ GdOhdjI ddfTQ hGdJhRjY,s, 1990)
(3GdeJJGHYGJ(B.s
Keywords: (3GdJaGVd hGdJcGeds -- (3OQGSI hJYdjes