(3GdESdGe h GdZQH (B: s (3NQGaI GdehGLgI GdOjf h GdSjGSI aj GdTQb GdChSW (B/ s - (3gGdjOGj, aQjOs; (3GdfYjej, YHO GdEdgs ((3HjQhJ (B:s (3OGQ GdSGbj,s, 1997)
Keywords: (3GdESdGes; (3GdEUdGM GdELJeGYjs; (3GdZQHs; (3GdKbGaIs; (3GdMVGQI GdZQHjIs