(3GdYQH (B: s (3eLdI oJYfi HJGQjN GdYQH hBOGHge hJQGKge GdacQj (B/ s ((3GdQjGV (B: s (3OGQ GdjeGeI ddHMK hGdfTQ , s, 1986)
Keywords: (3GdCOH GdYQHj; GdOQGSGJ GdJQGKjI; JGQjN GdCOHs