(3JdHjS EHdjS (B/s - (3GHf GdLhRj, YHO GdQMef Hf Ydj Hf eMeO,s 508-597 (3g`(B.s; (3GdLejdj, GdSjO EHQGgjes ((3HjQhJ (B:s (3OGQ GdcJGH GdYQHj,s, 1989)
Keywords: (3GdhYX hGdEQTGOs; (3GdSeYjGJs; (3GdHOY aj GdESdGes; (3GdESdGe hGdeLJeYs; (3GdJUha GdESdGejs; (3GdCeQ HGdeYQha hGdfgj Yf GdefcQs; (3GdTjGWjf hGdLGfs