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D.Cons | Don't litter subterranean Britain | conservation,UK |
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D.Cons | Thinking of Digging? | conservation,UK |
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D.Cons | Thinking of Digging? Part 2 - Choosing a site | conservation,UK |
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D.Cons | Thinking of Digging? Part 3 - Surface Digs | conservation,UK |
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D.Cons | Thinking of Digging? Part 4 - Digging Underground | conservation,UK |
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D.Cons | Thinking of Digging? Part 5 - Exploration and Survey | conservation,UK |
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D.Cons | A Punched Card Index of Cave Flora and Fauna | biospeleology,UK |