(3TYQ Gddgh h GdNeQ (B: s (3JGQjNg h CYdGeg , GdCYTi , GdCNWd , CHh fhGS (B/ s - (3ZQjH, LhQLs ((3HjQhJ (B:s (3OGQ GdKbGaI,s, 1983)
Keywords: (3GdTYQ GdYQHjs; (3JGQjN h fbOs