(3SaQ ai bUU GdaQGQ hGdQMdGJ GdYLdi (B/ s - (3QTOi GdSjSi (B((3eJQLe(B)s; (3HhcGf, Lhfs ((3GdbGgQI (B: s (3OGQ GdfgVI GdYQHjI , s, 1963)
Keywords: (3GdGOHs; (3GdbUUs; (3GOH GdQMdGJs