(3YbjdGJ GdLHd (B/ s - (3YHOGdQMef Hf RjO GdShjOGAs ((3GdQjGV (B: s (3ecJHI Gdedc agO GdhWfjI , s, 1990)
Keywords: (3GdSYhOjIs; (3GdbHGFd GdYQHjIs; (3GdSYhOjI (B- (3JGQjNs; (3GdYbjdGJs