Hodder, S. B., Skinner, R. I., Hefford, R. T., & Randal, P. M. (1978). Strong motion records of the Milford Sound earthquake 1976 May 4. Bulletin of the New Zealand Society for Earthquake Engineering, 11(3), 184–190. https://doi.org/10.5459/bnzsee.11.3.184-190