(3JeKGd Ydi GYeOI GdghGA(B: (3bUU bUjQI (B/ s - (3fHjd YHOGdMejOs; (3GHhHcQ YHOGdXGgQs ([S.N] : (3OGQ GdYde ddWHGYI , s, 1970)
Keywords: (3GdGOH GdYQHis; (3GdbUU GdYQHjI GdbUjQIs