(3GeQGV GdeMGUjd GdHSJfI (B/ s - (3GHh ZfjI , YHO GdfHj s ((3HZOGO (B[ (3GdYQGb (B] : s (3GdTQch GdYQHjI GdGjWGdjI ddWHGYI hGdfTQ , s, 1986)
(3jMJhj Ydi UhQ s
Keywords: (3GdeMGUjd GdRQGYjI s -- (3GeQGV s