(3GdGTGYI (B((3OQGSGJ GSdGejI gGOaI(B)s - (3O(B/(3GMeO fhads ((3YeGGfs (3OGQ GdaQbGf ddfTQs, 1983)
Keywords: (3ehVhYGJ YGeI aj GdOjGfGJs