(3OQI GdJfRjd hZQI GdJChd aj HjGf GdBjGJ GdeJTGHgGJ aj cJGH Gddg GdYRjR (B/ s ((3HjQhJ (B: s (3OGQ GdGaGb , s, 1979)
Keywords: (3GdJaSjQ hYdhe GdbQGfs