(3GdcSH ZjQ GdeTQhY (B:s (3OQGSI ebGQfI (B/s - (3YHO GdbGOQ, aDGO LeGds; (3SQhQ, CMeO aJMj s (1987)
(3HHdjhLQGajI (B: (3U(B. 402-411.s
Keywords: (3GdcSH ZjQ GdeTQhYs -- (3bhGfjf hJTQjYGJs -- (3eUQs -- (3CWQhMGJs; (3QSGdI LGeYjI (B((3OcJhQGg(B)s