(3GdJYRjQ hGdGJLGgGJ GdLfGFjI GdeYGUQI (B/s - (3GdOcJhQ YHOGdaJGM NVQs ((3GdQjGV (B:s (3EOGQI GdHMhK hGdGSJTGQGJ ,s, 1979)
(3jTJed Ydi GQLGYGJ HHdjhLQGajIs
Keywords: (3GdbGfhf GdLfGFjs