(3GdfXGe GdbGfhfj dYbO GdbQV GdOhdj (B:s (3OQGSI ebGQfI (B/s - (3YThT, CMeO YHO GdMejOs ((3GdEScfOQjI, eUQ (B:s (3eDSSI THGH GdLGeYI,s, 1990)
(3HHdjhLQGajI (B: (3U(B. 297-316.s
Keywords: (3GdbGfhf GdOhdj GdGbJUGOjs; (3GdbQhVs -- (3bhGfjf hJTQjYGJs