http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geochemical association of niobium (columbium) and titanium and its geological and economic significance
by Michael Fleischer [and three others].
"This report concerns work done on behalf of the U.S. Atomic Energy Commission and is published with the permission of the Commission."
Includes bibliographical references (pages 9-10).