Perrin, N.D. 1971 Tunnel logs to accompany a report on geology for test drives for terrace tunnels. Lower Hutt: New Zealand Geological Survey. New Zealand Geological Survey report EG 108/B 14 p.
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Perrin, N.D. 1971 Tunnel logs to accompany a report on geology for test drives for terrace tunnels. Lower Hutt: New Zealand Geological Survey. New Zealand Geological Survey report EG 108/B 14 p.