(3eSQMjGJ bUjQI(B:(3HQJhdJ HQjTJ (B/ s - (3HQJhdJ HQjTJs; (3UahGf MjOQs ([S.N] : (3GdeQcR GdKbGai GdYQHi , s, 1991)
Keywords: (3GdGOH GdGdeGfis; (3eSQMjGJ bUjQIs