(3Yde GdGYdGe h GdSjGSGJ GdGYdGejI aj GdYGde GdKGdK (B/s - (3Sja GdESdGe, GdRHjQ s ([(3Ohf ecGf(B] :s (3GdeQcR GdYQHj ddOQGSGJ GdGYdGejI ,s, 1981)
Keywords: (3GdGYdGejI s; (3GdSjGSGJ s; (3GdGYdGe s; (3Yde s