(3eONd Gdi GdGHSJehdhLjG h ebGdGJ aj GdacQ h GdMjGI (B/s ([(3Ohf ecGf(B] :s (3GdOGQ GdYQHjI ,s, 1984)
Keywords: (3ebGdGJ s; (3GdGHSJehdhLjG s; (3GdacQ s; (3eONd s