(3GdESdGe Hjf GdYdeGA hGdMcGe (B/s - (3GdHOQj, YHO GdYRjR,s (3J(B. 1969s ((3HjQhJ (B:s (3efThQGJ YGde GdTHGH,s, 2000)
Keywords: (3GdESdGe hGdEUdGMGJ GdSjGSjIs; (3GdESdGes -- (3LhGfH SjGSjIs; (3GdOYhI GdESdGejIs