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Cooper, A.H. The stratigraphy, correlation, provenance and palaeogeography of the Skiddaw Group (Ordovician) in the English Lake District. A.H.Cooper et al. In Geological Magazine, 1995, vol.132, no.2. Cambridge : Cambridge University Press, 199-, Geological Magazine, 1995, vol.132, no.2.S.185-211, : .
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