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The Geology of the South Wales Coalfield
Sir Aubrey StrahanRichard Hill TiddemanWalcot Gibson
其他書名
Explanation of Sheet 243. The country around Pontypridd and Maestêg
出版H.M. Stationery Office, 1917
URLhttp://books.google.com.hk/books?id=VLsoAQAAMAAJ&hl=&source=gbs_api