(3GdTYGQGJ hGdQehR GdGfJNGHjI (B/ s - (3UahJ GdYGdes ([S.N] : (3dLfI GdGYdGe hGdOQGSGJ GdeSJbHdjI , s, 1989)
Keywords: (3GdGfJNGHGJs