(3GdGYdGe h GdOYGjI aj MQH GdNdjL (B:s (3hKGFb ef ZQaI GdYedjGJ (B/s - (3TdHj, cQe s ((3GdbGgQI (B:s (3ecJHI GdJQGK GdGSdGej ,s, 1992)
Keywords: (3GdMQHs; (3GdNdjL s; (3GdGYdGe s; (3GdOYGjIs