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New Sections in the Basal Westphalian and Uppermost Namurian Strata at Risca and Abersychan, Monmountshire (with Palaeontology by MA Calver).
出版H.M. Stationery Office, 1972
URLhttp://books.google.com.hk/books?id=i56mXwAACAAJ&hl=&source=gbs_api