Bristol and Gloucestershire Archaeological Society | 2004 Waterbirds of the Tidal Avon at Sea Mills Reach 27: 45—52• 2002 Gulls of the Tidal Avon Bristol Ornithology 26: 23—36• Claverton Pumping Station A Definitive Study |
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Wales and West Central England: Wales and West Central England, 2nd Edition | Centre for Ecology and Hydrology |
Staff writer 12 December 2008 | Centre for Ecology and Hydrology |
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Freshford and Limply Stoke Environment Working Group | Bath and North East Somerset Conservatives |
Centre for Ecology and Hydrology | " Retrieved 5 May 2006 |
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Centre for Ecology and Hydrology | Centre for Ecology and Hydrology |