(3GdYGH GdMQH (B/ s - (3GdgGe YKeGfs; (3Gdjf(B,(3JheGSs; (3QGFO YWGQs ([S.N] : (3GdOGQ GdeUQjI ddfTQ hGdGYdGe , s, 1993)
Keywords: (3GdGMhGd GdSjGSjIs; (3GdGQgGHs; (3GdTQb GdGhSWs; (3S(B.(3Gi(B. (3Gjgs