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- National Trust in Wales, 4 results
- Trawsfynydd Nuclear Power Station (Wales), 1 results
- Nature Conservancy Council (Great Britain), 1 results
- Dinorwig Power Station (Wales), 1 results
- Rio Tinto Zinc Corporation, 1 results
- West Wales Naturalists' Trust, 1 results
- National Trust in Wales -- Correspondence, 1 results
- West Wales Naturalists' Trust -- Correspondence., 1 results
- Scott, Peter, 1909-1989 -- Correspondence., 1 results
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- Housing development -- Wales, 1 results
- Roads -- Wales, 1 results
- Afforestation -- Wales, 1 results
- Barrages -- Severn River (Wales and England), 1 results
- Bridges -- Wales, 1 results
- Historic buildings -- Conservation and restoration -- Wales, 1 results
- Hydroelectric power plants -- Wales, 1 results
- Industrial development projects -- Wales, 1 results
- National parks and reserves -- Wales, 1 results
- Nuclear power plants -- Wales, 1 results