Ultrasonic characterization of residual stress and flaws in cast steel railroad wheels : Clark, A.V.; Schramm, R.E.; Fukuoka, H.; Mitrakovic, D.V. Proceedings of the IEEE 1987 ultrasonic symposium, Denver, Colorado (United States), 14–16 Oct. 1987. Vol. 2, pp. 1079–1082. Edited by B.R. McAvoy. Institute of electrical and electronics engineers