http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
physical chemistry of mineral-reagent interactions in sulfide flotation
proceedings of symposium held at College Park, Md., April 6-7, 1978
compiled by Paul E. Richardson, Garrett R. Hyde, and Morris S. Ojalvo.
Information circular (United States. Bureau of Mines) ; 8818