(3GQcGf GdXGgQI ceUOQ ddMb (B( (3GdJfGRY Hjf GdbGfhf hGdhGbY GdeSJbQ(B) / s - (3eYgO GdHMhK hGdOQGSGJ GdYQHjIs; (3fYeGf eMeO Ndjd LeYIs ([S.N] : (3GdefXeI GdGSdGejI ddJQHjI hGdYdhe hGdKbGaI , s, 1977)
Keywords: (3GdbGfhfs; (3GdbGfhf GdeOfis; (3bGfhf GdGLQGAGJ GdeOfjIs; (3JfGRY GdbhGfjfs