(3GdQhGjI GdYGdejI(B: (3bWGQ ai GdLdjO (B/ s - (3dhaQGc, eGJhs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1987)
Keywords: (3GdbUU GdjhZhSdGajIs