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The Geology of the South Wales Coal-field
Sir Aubrey StrahanGeological Survey of Great Britain
其他書名
Being an Account of the Region Comprised in Sheet 230 of the Map. The country around Ammanford
出版H.M. Stationery Office, 1907
URLhttp://books.google.com.hk/books?id=nxNHAQAAMAAJ&hl=&source=gbs_api