(3GdUfGYGJ GdcjeGhjI GdJLGQjI (B( (3GdcJGH GdNGeS (B) / s - (3YHOGdcQje OQhjTs ([S.N] : (3OGQ GdeYQaI , s, 1991)
Keywords: (3GdUfGYGJs; (3UfGYI hJLGQIs; (3GdRLGLs; (3GdaNGQs