books.google.de - In the years covered by this volume, 1250-1450, the production patterns, in both the European precious and base metal industries, first established in the twelfth century, and described in volume two, continued to be played out. This now took place however in the context of a continuous process of increasingly...http://books.google.de/books/about/Mining_metallurgy_and_minting_in_the_mid.html?hl=de&id=um-EXNlRKO4C&utm_source=gb-gplus-shareMining, metallurgy and minting in the middle ages. 3. Continuing Afro-European supremacy, 1250 - 1450
