(3UfGYI GdScQ aj GdhWf GdYQHj (B: s (3JbQjQ YGe (B/ s - (3GdHSGW, eMeO QGLjs ((3HjQhJ (B:s (3eYgO GdEfeGA GdYQHj,s, 1976)
Keywords: (3GdScQs; (3GdHdOGf GdYQHjIs