(3TQM ebGeGJ LdGd GdOjf GdSjhWi (B/ s - (3SejQ eMehO GdOQhHi (B((3JMbjb(B)s ([S.N] : (3eDSSI GdQSGdI , s, 1989)
Keywords: (3GdGOH GdYQHis; (3GdebGdGJ GdYQHjIs