Template:HackettHistory
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| From: Hackett, Dennis. 1999. Our corporate history. Key events affecting the British Geological Survey, 1967–1998. British Geological Survey. Technical Report, WQ/99/1. |
| From: Hackett, Dennis. 1999. Our corporate history. Key events affecting the British Geological Survey, 1967–1998. British Geological Survey. Technical Report, WQ/99/1. |