TY  - RPRT
TI  - Major- and Trace-Element Concentrations in Soils from Two Geochemical Surveys (1972 and 2005) of the Denver, Colorado, Metropolitan Area
AU  - James E. Kilburn
AU  - David B. Smith
AU  - L. Graham Closs
AU  - Steven M. Smith
PY  - 2007
DO  - 10.3133/ds299
UR  - https://pubs.usgs.gov/publication/ds299
ID  - ds299
ER  -