(3eZfi GddHjH Yf cJH GdGYGQjH (B/ s - (3M (B. (3GdaGNhQi s ([(3HjQhJ (B] : s (3OGQ GdLjd ,s, 1991)
Keywords: (3GdfMhs; (3GddZI GdYQHjIs