(3GdeOQH GdaYGd (B: s 1000 (3acQI hacQI ehQO EQTGOGJ ebJVjI YedjI heHGTQI (B/ s - (3MSfjf, MSjf eMeOs ((3YeGf (B: s (3OGQ eLOdGhj, s, 2002)
Keywords: (3GdJYdje(B. s; (3WQb GdJOQjS(B. s; (3GdJOQjH(B. s