(3GdJGL GdLGeY ddCUhd aj CMGOjK GdQShd (B((3U(B)\(3JCdjas - (3fGUa,efUhQYdj,s ((3HjQhJ(B[(3dHfGf(B]:s (3OGQ GdacQ ddfTQ,s, 1986)
Keywords: (3GdMOjKs -- (3cJH GdUMjMs