http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Data handbook for clay materials and other non-metallic minerals
providing those involved in clay research and industrial application with sets of authoritative data describing the physical and chemical properties and mineralogical composition of the available reference materials
edited by H. Van Olphen and J. J. Fripiat.