http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Abundance and distribution of thorium in the carbonatite stock at Iron Hill, Powderhorn District, Gunnison County, Colorado
1 online resource (iii, B11 pages) : illustrations, maps.
by Theodore J. Armbrustmacher; prepared in cooperation with the Department of Energy.
Title from title screen (viewed October 9, 2014).
"An evaluation of the thorium resources of the carbonatite stock at Iron Hill."
Includes bibliographical references (page B11).
Geological Survey professional paper ; 1049-B
Geology and resources of thorium in the United States