(3CKQ GdNGOeGJ GdCLfHjGJ aj JQHjI GdWad (B/ s - (3GdCfUGQj, YfHQ MSjf YHO Gddgs ((3LOg (B:s (3OGQ GdeLJeY ddfTQh GdJhRjY,s, 1990)
Keywords: (3GdSYhOjIs; (3QYGjI GdWahdIs; (3GdUMIs; (3GdCSQIs; (3GdeQHjGJ GdCLfHjGJs