http://inspire.ec.europa.eu/codelist/CommodityCodeValue/holmiumINSPIRE Registry teamJRC-INSPIRE-SUPPORT@ec.europa.euhttp://inspire.ec.europa.eu/registry2015-08-18 18:10 PM CEST2015-08-18 18:10 PM CESTholmiumHolmium is a chemical element with the symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a rare earth element. - http://en.wikipedia.org/wiki/Holmium