(3af UjGZI GdMdi GdTYHjI GdfhHjI (B/ s - (3Ydi Rjf GdYGHOjfs ((3GdbGgQI (B: s (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1981)
Keywords: (3JGQjNs; (3GdMdis; (3GdeLhgQGJs; (3UjGZIs; (3GdfhHIs; (3GdeLhgQGJ ai GdOjf hGdadcdhQs