books.google.com - The first of four volumes, which examine non-ferrous precious and base metal mining, metallurgy and minting in the Middle Ages, encompasses the history of these activities during the years 425-1125. It describes the shift in the focus of world precious metal production from the Western Roman Empire -350),...http://books.google.com/books/about/Mining_Metallurgy_and_Minting_in_the_Mid.html?id=Zo2UVs_Sr68C&utm_source=gb-gplus-shareMining, Metallurgy and Minting in the Middle Ages
