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2. The Old Metal Mines of Mid-Wales: Part 3, Cardiganshire - North of Goginan;Bick,1976
3. Base metal mining and heavy metal contamination of agricultural land in England and Wales;Davies,1980
4. Heavy metals in soils and radish in a mineralised limestone area of Wales, Great Britain;Davies;Sci. Total Environ.,1975
5. The significance of windblow in the dispersal of toxic mine waste in the Cwmsymlog valley;Goldrick,1974