Thomson, R. 1975 Comparison of B28/1 and B28/2 drillholes DG7 site, Clutha River. Lower Hutt: New Zealand Geological Survey. New Zealand Geological Survey report EG 221 17 p.
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Thomson, R. 1975 Comparison of B28/1 and B28/2 drillholes DG7 site, Clutha River. Lower Hutt: New Zealand Geological Survey. New Zealand Geological Survey report EG 221 17 p.