(3GdNQR Gdedhf(B: (3NeSI GjGe ai MjGI fSQjf MhQi(B: (3QhGjI hfGFbjI (B/ s - (3eMeO SdeGhis ([S.N] : (3OGQ GdaGA GdYQHi , s, 1991)
Keywords: (3GdGOH GdYQHis; (3GdbUU GdYQHjIs