(3GdebGeGJ (B- (3TQM ebGeGJ GdReNTQjs - (3HbGYj(B. (3jhSas ((3OGQ GdcJGH GddHfGfjs (3HjQhJs, 1981)
Keywords: (3GdTYQ GdYQHj s; (3GdebGeGJs; (3ebGeGJ GdReNTQjs