(3eMGhQGJ Gdjhe GdSGHY (B: s (3OQGSGJ Yf eUQ aj GdCOH GdYQHj GdMOjK (B/ s - (3TcQj, ZGdjs ((3HjQhJ (B:s (3OGQ GdWdjYI,s, 1980)
Keywords: (3GdCOH GdYQHjs; (3GdfbO GdCOHjs; (3eUQs