Ellison, B. K. “Earthquake Damage to Roads and Bridges: Madang, T.P.N.G. - November 1970”. Bulletin of the New Zealand Society for Earthquake Engineering 4, no. 2 (June 30, 1971): 243–257. Accessed September 28, 2026. https://bulletin.nzsee.org.nz/article/view/1301.