Home › Authors › Volker Zepf 👤 Volker Zepf 2 books Books by Volker Zepf Rare Earth Elements : A New Approach to the Nexus of Supply, Demand and Use 2015 Rare Earth Elements A New Approach To The Nexus Of Supply Demand And Use As Exemplified By The Use Of Neodymium In Permanent Magnets 2013