Geological Survey (U.S.) & Kilburn, J. E. (2007). Major- and trace-element concentrations in soils from two geochemical surveys (1972 and 2005) of the Denver, Colorado, metropolitan area (Version 1.0.). U.S. Geological Survey.
Chicago Style (17th ed.) CitationGeological Survey (U.S.) and James E. Kilburn. Major- and Trace-element Concentrations in Soils from Two Geochemical Surveys (1972 and 2005) of the Denver, Colorado, Metropolitan Area. Version 1.0. [Reston, Va.]: U.S. Geological Survey, 2007.
MLA (9th ed.) CitationGeological Survey (U.S.) and James E. Kilburn. Major- and Trace-element Concentrations in Soils from Two Geochemical Surveys (1972 and 2005) of the Denver, Colorado, Metropolitan Area. Version 1.0. U.S. Geological Survey, 2007.
Warning: These citations may not always be 100% accurate.