http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Catalytic properties of natural and rare-earth-promoted manganese nodules
by E. F. Ferrell, L. J. Nicks, and D. J. Bauer.
Report of investigations (United States. Bureau of Mines) ; 8330