(3GdYhGUe ef GdbhGUe aj KhHg GdLOjO s (3JMbjb aj ehGba GdUMGHI s - (3Hf GdYQHj , GHh HcQ s ((3HZOGO (B:s (3OGQ GdKbGaI ,s, 1990)
Keywords: (3GSdGe (B- (3YUQ GdNdaGA GdQGTOjf s