(3GdJZjQ GdGLJeGYj hGdLQjeI aj GdeLJeYGJ GdYQHjI(B\(3JCdjas - (3YHO GdeJYGd,UdGMs ((3GdbGgQI,(B[(3eUQ(B]:s (3OGQ ZQjH ddWHGYI,s, 1980)
Keywords: (3GdLQjeIhGdeLQehfs