(3OQGSI JMSjf EfJGLjI eMGUjd GdMHhH aj GdhWf GdYQHj (B/ s - (3GdefXeI GdYQHjI ddJfejI GdRQGYjIs ((3GdNQWhe (B:s (3GdefXeI,s, 2000)
Keywords: (3GdRQGYIs; (3GdeMGUjd GdMbdjIs; (3GdMHhHs; (3GdhWf GdYQHjs