(3QSGFd Edi EeQCI ZQjHI (B: s (3bUjOI WhjdI ehRYI aj KeGf h YTQ h YTQjf dhMI (B/ s - (3GdHQGOYj, NGdO eMj GdOjfs ((3JhfS (B:s (3GdOGQ GdJhfSjI ddfTQ,s, 1974)
Keywords: (3GdTYQ GdYQHjs; (3GdYUQ GdMOjKs; (3JhfSs