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Social Life in Britain from the Conquest to the Reformation

George Gordon Coulton

出版	University Press, 1919
URL	http://books.google.com.hk/books?id=qUDpVGHoNQMC&hl=&source=gbs_api

註釋

"The Deep" Summary: This episode tells the story of the evidence supporting the current theories of plate tectonics and the process of the formation of the earth's crust.