(3GdWahdI hGdMde (B((3bUU(B) / s - (3JQHgI RGhi OQGfs ([S.N] : (3GdeDSSIGdhWfjI ddcJGH , s, 1985)
Keywords: (3GdGOH GdYQHis; (3GdbUU GdYQHjIs