Bluck, B.C. and Glogau, O.A. 1972. Classification of high earthquake risk buildings: Draft code of practice, 2 March 1972
. Bulletin of the New Zealand Society for Earthquake Engineering. 5, 3 (Sep. 1972), 108–109. DOI:https://doi.org/10.5459/bnzsee.5.3.108-109.