(3GdJfejI GdUfGYjI aj GdOhd GdfGejI (B/ s - (3GdYOd, CfhQ YWjgs ((3GdGScfOQjg (B:s (3OGQ GdeYQaI GdLGeYjI,s, 1987)
Keywords: (3GdHdOGf GdfGejIs; (3GdSjGSI GdEbJUGOjIs; (3GdUfGYGJs