(3eGFI jhe ai GMQGT GaQjbjG (B/ s - (3MGeO SdjeGfs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1991)
Keywords: (3GdGOH GdYQHis; (3GdQMdGJ ai GdGOHs