(3GdeZhd aj GdJGQjN (B/ s - (3GdUjGO, aDGO YHO GdeYWjs ((3HjQhJ (B:s (3OGQ GdfgVI GdYQHjI,s, 1980)
Keywords: (3BSjGs; (3JGQjN BSjGs; (3GdeZhds