Dellow, G. D., S. A. L. Read, J. G. Begg, R. J. Van Dissen, and N. D. Perrin. 1992. “Distribution of Geological Materials in Lower Hutt and Porirua, New Zealand”. Bulletin of the New Zealand Society for Earthquake Engineering 25 (4), 332-44. https://doi.org/10.5459/bnzsee.25.4.332-344.