(3ef gOj GdSda aj WdH GdYde (B/s - (3GdRgQGfj, eMeO Hf eWQ YKeGfs 1368 (3gLQj(B-s ([(3O(B.(3e(B.]:s (3OGQ WjHI GdNVQGA,s, 1997)
Keywords: (3GdESdGe hGdYdhes; (3BOGH WGdH GdYdes