(3ajUd Hf YHO GdYRjR ef NdGd CbhGdg h CYeGdg (B/s - (3UdGM GdOjf, GdefLOs ((3HjQhJ (B:s (3OGQ GdcJGH GdLOjO ,s, 1972)
Keywords: (3CYeGdgs; (3CbhGdg s; (3Gdedc ajUd s