http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
List of Bureau of Mines publications and articles with subject and author index
List Bur. Mines publ. artic. subj. author index
U.S. Department of the Interior, Bureau of Mines
Instituto Geológico Centro de Comunicações Técnico-Científica em Geociências