(3GdeDQNhf GdJhfSjhf ai GdbQhf (B17_18 _19(3e (B: (3QSGdI ai JGQjN GdKbGaI (B/ s - (3YHOGdQGRb GdMdjhis; (3GMeO YHOGdSdGes ([S.N] : (3GdeLeY GdJhfSi ddYdhe hGdGOGH hGdafhf , s, 1993)
Keywords: (3JhfSs; (3GdJGQjN GdGSdGeis; (3GdKbGaIs; (3GdeDQNhf GdJhfSjhfs