(3GdYhOI Gdi Gdefai (B/ s - (3GHhGdeYGWi GHhGdfLGs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1990)
Keywords: (3GdGOH GdYQHis; (3GdbUU GdYQHjIs