(3YahG GjgG GdGLOGO YdjfG GdSdGe eSQMjI ai aUdjf (B/ s - (3fHjd HOQGfs ([S.N] : (3GdgjFI GdeUQjI GdYGeI ddcJGH , s, 1991)
Keywords: (3GdGOH GdYQHis; (3GdeSQMjGJ GdSjGSjIs; (3GdeSQMjGJ GdYQHjIs